Background: Despite several years of guidance on infant feeding, there has been only a slight change in consumer compliance. Therefore, this study aimed to analyse parents feeding practices, explore physicians’ advice about infant feeding and subsequent parent’s adherence to advice.
Methods
A multicentric cross-sectional qualitative and descriptive self-report online study was conducted in volunteers to participate in the study.
Results
Fifty-four physicians (paediatricians and general practitioners) and 600 parents of infants were recruited. Of the infants, 20.2% presented at inclusion with at least one type of functional gastrointestinal disorder. The breastfeeding prevalence was quite low (37.3%). The main initial deviance from guidelines said they observed in infant feeding was the early use of cow’s milk. More than two-thirds of infants older than 8 months were drinking cow’s milk. The introduction of solid foods was globally in line with recommendations. Most physicians gave advice about the different aspects of infant feeding but were seeking more information, as did the parents. A discrepancy between the physicians’ statements and the parents’ perceptions was observed. However the majority (95.4%) of parents reported that they followed totally or partially the advice received, especially by abandoning subsequently the use of cow’s milk in favour of a formula. The main reason for not adhering to the advice was that they did not consider it suitable for their infant and they preferred to rely on their feelings or recommendations from familiars.
Conclusions
This survey provides good insights into parents’ infant feeding practices together with the advice given by their doctor. The gap between practices and current guidelines is notable only for breast-feeding and use of formula. Despite several guidelines professionals and parents seek nutrition information. It highlights the need to deliver consistent, relevant, and less confusing messages about infant feeding.
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Abkürzungen
BF
Breast-feeding
CNSD
Chronic non-specific diarrhoea
d
day
FGID
Functional gastrointestinal disorders
FOF
Follow-on formula
GP
General practitioners
HA
Hypoallergenic formula
IF
Infant formula
ISF
Introduction of solid foods
SPIF
Specific infant formula
STIF
Standard infant formula
YCF
Young child formula
Introduction
Infant feeding is an important determinant of both growth and development and poses medium and long-term risks for developing non-communicable chronic diseases [1]. Different guidelines for feeding practices and nutrient requirements have been released over the years [2‐8]. However, the general observation is that parents’ dietary practices are incongruent with the guidelines [9‐16]. A recent survey of 1184 families in France highlighted the low prevalence and duration of breastfeeding and the early abandonment of infant formulas for the use of cow’s milk, while the introduction of solid foods was done within the recommended time range [16]. While many factors may account for this gap [13], practitioners have a responsibility to provide evidence that is based on the best practice advice. Therefore, the aims of the present survey were: first to analyse the parents’ prior practices in their infant’s feeding, and to describe the subsequent physicians’ advice on this feeding, and second to assess the parents’ adherence to physician advice.
Materials and methods
A multicentric cross-sectional qualitative and descriptive online study was conducted in mainland France from 5 February to 31 December 2016, according to the ethical standards.
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Participants
All paediatricians and general practitioners (GPs) who were known to be regularly engaged in infant primary ambulatory care were invited by mail or email to participate in the study. Once agreed, they received a username and personal password to access a dedicated secure website (Optinutri.fr). Each practitioner had to invite parents of a first healthy infant aged 1 to 12 months to participate, provided they were fluent in French and able to use the Internet. The infants were divided into five age groups corresponding to the usual ages that the diet is modified: 1–2, 3–4, 5–6, 8–9, and 11–12 months (infants aged 7 or 10 months were excluded). After receiving verbal and written explanations of the purpose and content of the research parents gave first verbal consent and provided their e-mail address and telephone number, which were registered and encrypted on the website using a stream cipher (RC4, RSA Security LLC, MA, USA), and email and text messages were immediately sent to the parents: one with the link to the parent questionnaire and another with their personal access code. Parents confirmed their consent online when they first connected.
Study design
After baseline data were collected online, the physician interviewed the parents and examined the infant to complete the questionnaire. A remuneration equivalent to the price of an infant consultation was awarded for this work. Two weeks after this visit, the parents were contacted by email and text message and asked to access the website and complete their questionnaire, which was inaccessible to the physician.
Questionnaires
Online questionnaires were developed by the investigators using C# (ASP.net) framework (version 2.0; Microsoft Corporation, WA, USA) together with Visual Studio software 2008 (Microsoft Corporation, Redmond, WA, USA). Data storage was externally managed using SQL server software (version 2008 R2; Microsoft Corporation, Redmond, WA, USA).
Both questionnaires were structured and consisted of multiple choice, yes/no, and open-ended questions (103 for physicians and 44 for parents) grouped into predefined sets. Physician questionnaires included (Additional file 1): birth and current infant characteristics; parents’ allergy history, as defined by Kjellman [17]; functional gastrointestinal disorders (FGID) according to the Rome III criteria [18]; infant feeding practices since birth and currently, based on a 24 h recall; dietary advice given in relation to any breastfeeding, use of infant formula, the introduction of solid foods, or a possible FGID; and the time spent providing this advice. Parent questionnaires (Additional file 2) asked about infant feeding at follow-up, adherence to the doctor’s advice, observance in their daily practice, and their feelings about the time devoted to this advice. After questionnaire completion, all parent identifiers were deleted from the data. At the end of the survey, the database was frozen after backup and access to the survey website was deactivated.
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Data analysis
Results were given as the number, percentage, and median with the interquartile range (Q1–Q3). The Stat Process of SAS 9.2 (SAS Institute, Cary, NC, USA) was used for statistical analyses. Pearson’s chi-squared or Fisher’s exact tests with the Monte Carlo algorithm were used for the qualitative categorical and binary data, the Kruskal–Wallis test was used as a non-parametric test for the quantitative data. To compare doctor and parent’s perception on the same item McNemar’s test was used for the paired nominal data, and Cohen’s kappa coefficient (κ) measured inter-rater agreement for the qualitative (categorical) items. A significance level of 0.05 was used, with a 95% confidence interval.
Results
Of the contacted physicians, 159 (1.2%) answered the invitation; 54 (34%) physicians, including 31 paediatricians and 23 GPs, agreed to the protocol and conducted the study. The paediatricians included 461 infants (76.8%) and the GPs included 139 infants (23.2%). Three infants were excluded because they did not meet the inclusion criteria. The mother was the usual respondent (93.4%).
Data at inclusion
Infants’ characteristics
Infants’ characteristics are shown in Table 1. A history of allergic disease was noted in 32.8% of the infants’ parents (mother: 14.9%; father: 12.4%; both: 5.5%).
Table 1
Infants’ characteristics at inclusion, including gestational age, birth weight and length, and current age, weight, and length, given as the median with the interquartile range (Quartile 1 to Quartile 3)
Age group (months)
1–2
3–4
5–6
8–9
11–12
Total
N = 600
Birth data
Number
150
132
146
90
79
597
Number (%) of Preterm infants
7 (4.7%)
17 (12.9%)
13 (8.9%)
6 (6.7%)
7 (8.9%)
50 (8.4%)
Birth weight (kg)
3.31 [3.05–3.57]
3.28 [2.91–3.65]
3.27 [3.00–3.50]
3.27 [2.95–3.60]
3.30r [3.00–3.55]
3.29 [2.99–3.57]
Birth length (cm)
49.70 [48.00–51.00]
50.00 [48.00–51.00]
50.00 [48.00–51.00]
49.00 [48.00–51.00]
49.50 [48.00–51.00]
50.00 [48.00–51.00]
Inclusion data
Number
151
132
147
90
80
600
Sex ratio M/F
1.40
1.28
1.10
0.91
1.22
1.19
Age (weeks)
9.00 [4.00–9.00]
17.00 [14.00–18.00]
24.00 [23.00–26.00]
39.00 [37.00–40.00]
50.00 [48.00–52.00]
22.00 [12.50–37.00]
Weight (kg)
4.90 [4.15–5.40]
6.51 [6.11–7.19]
7.60 [7.00–8.30]
8.76 [8.20–9.22]
9.70 [8.72–10.20]
7.20 [5.78–8.50]
Length (cm)
56.00 [54.00–58.00]
63.00 [60.25–64.50]
66.00 [65.00–68.00]
71.25 [69.00–73.00]
75.00 [73.00–77.00]
65.00 [59.75–70.00]
Functional gastrointestinal disorders
Figure 1 presents the prevalence of FGID, which was higher in the GPs’ practices (29.5% vs 17.4%, p = 0.003). Simultaneous regurgitation and crying were noted in 7.8% of the infants, and constipation together with another FGID were present in 4.9% of the infants. Infants with regurgitation had 2.00 (1.00–4.00) regurgitation episodes per day (maximum 8.00). Excessive crying mainly occurred in the evening (57.9%) and rarely during the night (15.8%). Constipated infants had 4.00 (4.00–7.00) movements per week (minimum 1.00). The stools were described as hard in 60.7% of the infants and defecation was painful in 45.5%.
Fig. 1
Prevalence (percentage) of functional gastrointestinal disorders (FGID) in the infants (n = 598) at inclusion, which included at least one type of FGID, colic, regurgitation, chronic non-specific diarrhoea (CNSD), and constipation
×
Feeding practices
The prevalence of breastfeeding at the time of inclusion is depicted in Fig. 2a. No difference was observed between practitioners except in the 1–2 months age group (37.3% of paediatricians vs 20.4% of GPs, p = 0.04). Information was obtained about breastfeeding at birth for 63.7% of the current non-breastfed infants and there was a positive result in 21 infants. The subsequent estimated overall prevalence of breastfeeding at birth was 37.3%. Problems with breastfeeding were reported by 16.7% of the breastfeeding mothers, which included ways to enhance lactation, engorgement or cracked nipples, having infants with a ‘gourmet’ or ‘rester’ feeding style, and/or planning their return to work. Overall, 286 (47.8%) infants consumed a formula either exclusively (83.2%) or together with breastfeeding. After 2 months of age, an increasing proportion of infants were fed cow’s milk (Table 2). The type of formula used by 87.8% of the infants is detailed in Fig. 2b; there was no difference between physicians. More than 40% (115) were fed a specific infant formula designed for either FGID (regurgitations: 36; colic: 3; constipation: 15; satiety: 8; miscellaneous: 31), low birth weight (4), prevention of an allergy (HA formula: 11), or suspected cow’s milk allergy (7).
Fig. 2
Feeding practices at inclusion: (a) percentage of infants in the different age groups who were either exclusively breastfed (BF), partially breastfed, or formula fed, and those who consumed complementary foods (CF) including cow’s milk and excluding formula and water (n = 598) [2, 6], and (b) the prevalence of the consumption of each category of formula in formula-fed infants, when indicated (n = 251). The types are identified as standard infant formula (STIF), specific infant formula (SPIF), hypoallergenic formula (HA), follow-on formula (FOF), and young child formula (YCF). The data labels represent the number of infants
Table 2
Comparison of milk diet practices between inclusion (I) and follow up (F). Results are given as number and percentage
Age group
1–2 mo
3–4 mo
5–6 mo
8–9 mo
11–12 mo
Overall
I
F
I
F
I
F
I
F
I
F
I
F
Number
151
105
132
102
146
111
90
63
79
56
598
437
Exclusive BF
48 (31.8%)
28 (26.7%)
25 (18.9%)
17 (16.7%)
23 (15.8%)
19 (17.1%)
2 (2.2%)
5 (7.9%)
3 (3.8%)
3 (5.4%)
101 (16.9%)
72 (16.5%)
Partial BF
19 (12.6%)
15 (14.3%)
17 (12.9%)
15 (14.7%)
6 (4.1%)
9 (8.1%)
4 (4.4%)
3 (4.8%)
2 (2.5%)
4 (7.1%)
48 (8.0%)
46 (10.5%)
Formula
83 (55.0%)
61 (58.1%)
82 (62.1%)
69 (67.6%)
38 (26.0%)
80 (72.1%)
21 (23.3%)
53 (84.1%)
13 (16.5%)
46 (82.1%)
238 (39.8%)
309 (70.7%)
CM
1 (0.7%)
1 (1.0%)
8 (6.1%)
1 (1.0%)
79 (54.1%)
2 (1.8%)
63 (70%)
0 (0.0%)
61 (77.2%)
2 (3.6%)
211 (38.5%)
6 (1.4%)
p
NS
NS
< 0.0001
< 0.0001
< 0.0001
< 0.0001
BF breast_feeding, CM Cow’s milk, mo months
×
Medical advice about feeding
Medical advice given to 97.8% of the parents and the time spent doing so are presented in Fig. 3a; the time spent was longer for paediatricians (Fig. 3b). Time spent was considered insufficient by 8.7% of the physicians, with paediatricians wishing for 15 min (10–20, n = 38) and GPs for 10 min (5–15, n = 13) (p = 0.001).
Fig. 3
Time (minutes; min) dedicated to feeding advice: (a) by age group (months; mo) and (b) by physician type (paediatricians or general practitioners (GPs)). The results are given as the percentage of parents to whom time was devoted in each time range. The numbers in the labels represent the number of parents
×
Breastfeeding advice (Table 3) did not differ between physicians but paediatricians more frequently gave advice about using infant formula (107 vs 16, p = 0.01). Of the 121 recommendations given for choosing a formula, 43.8% concerned a specific infant formula (i.e., thickened formula 47.2%, formula for constipation 20.8%, and formula for colic 15.1%). Advice about introduction of solid foods was given to 59% of parents (Table 3), and given more frequently by paediatricians (62.3% vs 48.2%, p = 0.002).
Table 3
Physicians advice topics as given to breastfed (BF) or formula fed infants’ parents, and about solid foods. Topics given as number and (percentage) of advices
Breastfed infants (n = 149)
Advices given
100 (67.1%)
Topics (% of advices)
Feeding frequency
57 (57.0%)
Duration of each feeding
36 (36.0%)
Benefits of BF
32 (32.0%)
Intended weaning
45 (45.0%)
Maternal diet
26 (26.0%)
Consequences of smoking, taking alcohol, drugs or medications.
19 (19.0%)
Formula fed infants (n = 286)
Advices given
123 (43.0%)
Topics (% of advices)
Kind of formula
122 (98.4%)
Volume/bottle
108 (87.8%)
Feeding frequency
89 (72.4%)
Volume/day
78 (63.4%)
Solid foods (n = 598)
Advices given
353 (59%)
Topics (% of advices)
Age of introduction of solid foods
223 (63.2%)
Order of introduction
196 (55.5%)
Modes of administration
194 (54.5%)
Progressive texture
256 (72.5%)
Quantity of each type of food
294 (83.3%)
Home-made or specific baby-food
157 (44.5%)
Varied diet
266 (75.4%)
Sharing meal with family
94 (26.6%)
Behavior in case of food refusal
208 (58.9%)
Age of introduction of Gluten
166 (47%)
The recommended age for introduction of solid foods was between 4 and 6 months in 85.2% of cases. Cooked vegetables were the first category introduced (76%), followed by cooked fruits (5.6%), or both (14.8%), and infants’ cereals were recommended in only 1.5% of cases. Spoon-feeding was the recommended mode of introduction in most cases (89.2%). Advice about quantities and gradual increases was more common for vegetables or fruit (84.4%) than for meat or fish (57.1%). Of 157 pieces of advice about the type of food to give, 40.8% favoured homemade meals, 13.4% specific commercial baby foods, and 45.9% suggested both. For meal preparation, 86.3% of the advice recommended limiting added salt, 69.3% was about limiting added sucrose, 49.5% was about cooking method, and 25.9% was related to washing vegetables and fruits. In the case of food refusal, parents were advised ‘do not force’ (60.6% of 208 recommendations) or ‘offer the disliked food repeatedly several times in the following days’ (54.3%).
When gluten introduction was addressed, the main advice (93.6%) concerned optimal age, which was between 4 and 6 months in 31% of cases, 4 and 7 months in 23.9%, and after 6 months in 44.5%. The mode of introducing gluten was addressed in 88% of cases, by adding cereals to the bottle in 58.9%, and by gradually increasing quantity in 80.7%. Postponing introduction of solid foods was recommended for 27.7% of infants with a parental allergy history, mainly for tropical fruits (61.3%) or nuts (23.1%).
There were differences in the number of paediatricians and GPs providing advice relating to introduction of solid foods mode (p < 0.001), food texture (77.6% vs 50.7%, p < 0.001), food quantity (73.4% vs 46.3%, p = 0.046), response to food refusal (64.3% vs 36.4%, p < 0.001), and introducing gluten (50.3% vs 32.8%, p = 0.01).
Among the 54 physicians, 49 (90.7%) wanted more information about infant feeding topics listed in Table 4; 64% preferred access via a journal, 44% via a newsletter, 38% via the Internet, 20% via a company document, 8% via a smartphone app, and some chose several options.
Table 4
Topics of interest about which physicians would like to obtain more information (n = 49) shown as the number and percentage of requests
Topics
Number of requests (%) for the information
Number of requests (%) first cited
Scientific societies’ guidelines
27 (50.0)
12 (24.5)
Diet of infants with FGID
27 (50.0)
2 (4.1)
Nutrient requirement
26 (46.3)
12 (24.5)
Prevention of allergy
21 (38.9)
8 (16.3)
Protein requirement
18 (33.3)
4 (8.2)
Food introduction/age
18 (33.3)
2 (4.1)
Textures/age
16 (29.6)
1 (2.0)
Gluten introduction
14 (25.9)
1 (2.0)
Treatment of food allergy
14 (25.9)
2 (4.1)
Quantities of milk/age
9 (16.7)
4 (8.2)
Weaning
7 (13.0)
1 (2.0)
FGID functional gastrointestinal disorders
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Parents’ perceptions and adherence to medical advice
Four hundred and thirty-seven parents (72.8%) completed their questionnaire an average of 16 days (14–26) after the initial visit.
Parents’ perceptions
Among these, 434 (99.3%) answered the questions about medical advice, with 414 (95.4%) reporting they received one or more pieces of dietary advice and 43% obtaining a brochure that mainly explained the introduction of solid foods. Overall, the parents’ statements about receiving feeding advice were discordant with the physicians’ statements (p < 0.0001, κ = 0.11); 14.3% claimed to have received advice that was not reported as given by the physician. This discrepancy was significant in the groups with infants under 5 months. The comparison of the time spent in consultation reported by the parents and that declared by the physician was concordant in 28.9% of the parents, whereas 33.6% thought that this time was longer and 37.4% thought that it was shorter. Of the parents, 84.4% reported that the consultation time was sufficient versus 91.3% of the physicians, and there was no concordance between the answers (p < 0.0001, κ = 0.079).
Parents’ adherence
When all advice was combined, 4.6% of the counselled parents said they had not followed the advice given so far, 8.7% had followed it partially, 45.3% had followed it mostly, and 41.3% had followed it totally. The parents of younger infants were the most adherent (p < 0.001). In descending order, the five most followed pieces of advice were the age for introduction of solid foods, the order in which to introduce the solid foods categories, the choice of formula, food quantity at each age, and food category amounts. About 75% parents reported that advice they received resulted in improved condition in FGID infants. The most frequent reason parents gave for non-adherence was that it was not suitable for their infant (54.4% of the 22 pieces of infant formula advice not followed and 42.9% of the 91 pieces of introduction of solid foods advice not followed). The second reason was personal choice followed by conflicting advice from family and friends. The five least followed pieces of advice were about weaning, the amount of formula, the advantage of homemade food, the advantage of specific baby food, and the age for introducing gluten.
Dietary practices at the follow-up
Following the consultation, the consumption of cow’s milk by infants older than 5 months was significantly reduced, replaced by more frequent use of formula (Table 2).
Discussion
Since few studies [9‐12, 15, 16, 19‐23] have conducted similar investigations, this pilot study provides important data on differences between professionals’ perceptions and parents’ perceptions and subsequent behaviour in regard to infant feeding, and highlights a number of key issues important to developing future guidelines. Except for one earlier study [19] the current study is the only one to recruit both paediatricians and GPs.
Although it is not certain that the Rome III criteria were applied strictly, the prevalence of FGID in our sample was much lower than previously reported [24, 25]. The GPs higher proportion of FGID infants may be due to patient and family differences but may also be a result of poor knowledge of the criteria [18]. The prevalence of parental atopic history is higher than that originally described in one study (14.3%) [17], but similar or even lower than in more recent studies (27.2 and 43.2%) [26, 27].
This survey recognised that the majority of physicians and parents were aware of infant feeding methods. However, initial dietary practices in our sample were far from optimal regarding breastfeeding and the preference for infant formula instead of cow’s milk [2‐6]. No information was collected about what may have influenced these practices. The prevalence of breastfeeding is generally reported as low in France, [16, 28, 29]. A surprisingly large proportion of non-breastfed infants in our sample had already consumed cow’s milk, which was higher than that reported in the Nutri-Bébé study (5.1%) [16], and less than half of the infants consumed a formula. Of note is the small number of children who were fed HA formula considering the observed prevalence of family allergy history, but at-risk infants were not identified among the breastfed infants. This contrasts with the results of the AllerNaiss study reporting a screening strategy for allergy history in 59% of 387 French maternity wards and a subsequent prescription of HA formula, in the absence of breastfeeding in 90% of the wards [30].
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The majority of parents adhered to the guidelines when introducing solid foods. No infant younger than 5 months consumed them. In the Nutri-Bébé study, the mean age for the introduction of solid foods was 5.4 ± 2.1 months [16]. These results are more encouraging than those reported by other researchers [9, 11, 19]. Of note, however, is the persistence of postponing introducing some specific foods in case of parental allergy history. Information given about texture was more frequent than previously reported [22].
Most of the physicians spent time giving advice. Overall, this advice was in line with the guidelines, whereas in a study conducted in southern France, only 65% of paediatricians (n = 50) or paediatric residents (n = 34) gave such advice [21]. Physicians would like to obtain more information about infant feeding practices, which highlights the gap between the publication of scientific guidelines and professionals’ perception.
In the follow-up, the parents’ response rate was high and very few said they were not observing the advice. As a result, the main deviance initially observed, the early consumption of cow’s milk, was corrected. Among non-compliant parents, the reason given was lack of confidence in their doctor and a preference for advice from family and friends or other environmental sources [15, 19, 20]. It is astonishing to note that the advantages of homemade food or specific baby food and the age for introducing gluten were among the least followed pieces of advice. There is a large discrepancy globally between physicians’ statements and parents’ perceptions. While reported compliance with current infant feeding guidelines was not terribly poor, there is nevertheless a long way to go before the behaviour perfectly matches the guidelines. As proposed by others, the parents’ and physicians’ interest in nutrition and health, coupled with their confusion, suggests that there are shortcomings in current nutrition communication and that there are important opportunities to improve dietary guidance [13, 31].
Our results should be viewed in the context of the study’s limitations. The number of participating physicians was relatively small, but they recruited a larger sample of parents than in other studies [9, 15, 20, 23]. We acknowledge that our survey recruited a selected and demographically biased sample of parents who were mostly educated and fluent in French and able to use the Internet, which is not nationally representative. Moreover, only primiparous mothers were recruited, and having more children is linearly associated with higher nutritional knowledge (p < 0.01) [10]. Our results are also based on self-reported practices rather than objective audit data, which may compromise reliability. Finally, while using a structured questionnaire allowed precise and comparable answers, it may also have guided the answers.
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Conclusion
While our study does not reveal a large gap between current guidelines and physicians’ and parents’ practices, a number of improvements are desirable. Given the study’s declarative aspects conclusions must be interpreted with caution. However, an important point was raised—despite the existence of several published guidelines, some professionals and parents seek nutrition information while others ignore the recommendations, emphasising the need to review strategies for promoting good nutrition. Providing consistent and relevant advice might decrease confusion and render the advice more acceptable and increasing awareness of media influences may decrease messages that conflict with scientific committees’ guidelines.
Indeed possible contradictions between opinion leaders lead to confusion, which contributes to counteracting nutrition counselling in general and lead parents to consider scientists really do not know what foods are good for their child. But what matters is that dietary advice must clearly explain the recommended behaviours and why changes have occurred so that consumers have the opportunity to develop an appreciation of how scientific knowledge evolves. Effective guidance needs to consider what really matters to parents and must promote recommendations based on foods instead of nutrients. One step could be to help parents understand why and how healthy eating can be beneficial in the short, medium and long term for their child. Nutrition messages need to be simple, clear, easy to understand, realistic, positive, and exploitable fitting with modern lifestyles without demanding a complete renunciation of habits. An objective audit of medical practices is needed but may be difficult to achieve.
Acknowledgements
The authors thank all the physicians and families who gave their time to participate in the survey as well as the data management and statistical analysis team.
Ethics approval and consent to participate
The entire survey was in accordance with the 1964 Helsinki declaration and it’s later amendments. According to Article R1121–1-II-2 of the French Public Health Code, the survey designed to evaluate the exercise of health professionals and which does not involve any medication or blood tests are exempt from ethical review (https://www.legifrance.gouv.fr/telecharger_pdf.do?cidTexte=LEGITEXT000006072665). The study protocol and the online procedures were approved by the Comité Consultatif sur le Traitement de l’Information en Matière de Recherche dans le Domaine de la Santé (Advisory Committee on Information Processing for Health Research; reference number: CCTIRS 15343, 13 May2015).
Informed consent was obtained from all individual parents included in the study first verbally by the physician, then in writting on line when parents first connected.
Consent for publication
Not applicable.
Competing interests
JPC received fees from Nestlé as a consultant and for giving lectures and received support from Nestlé and Mead Johnson to attend a congress. MB and CJ received fees from Nestlé in the context of this study and from Laudavie unrelated to this study. MB also received fees from Danone and Lactalis as a consultant and for giving lectures. BD, ML, and TH are all employed by Nestlé.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
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