Background
Anxiety disorder is the most prevalent mental disorder among children and adolescents. Internationally, 6.5% of all children and adolescents meet the diagnostic criteria for anxiety disorder at least once in their life [
1]. Anxiety disorder causes significant psychosocial problems, including impaired academic and social competence, and can lead to physical health problems [
2,
3].
Cognitive behavioral therapy (CBT) is an effective treatment for childhood anxiety disorder. And parent-only CBT is an alternative treatment for childhood anxiety disorder, which includes psychologists and parents rather than children in the treatment. By previous study, we reported meta-analysis about child-CBT for anxiety disoder and noticed parent-only CBT for children anxiety is an interesting treatment which have unique advantages, especially for young children. So on the basis, we did this research focused on parent-only CBT [
4‐
10]. As one type of CBT used with children and adolescents, CBT with parents has been demonstrated to be effective for treating children and adolescents with anxiety [
5,
11,
12]. However, child-focused CBT has several disadvantages. First, language and cognitive competence are major obstacles, especially for young children [
13]. Stigma associated with receiving mental health intervention is another significant obstacle for children [
14,
15], as children are more likely to be stigmatized by others for help-seeking behaviors, compared with parents [
14]. Furthermore the importance of the family environment and parenting style factors have been identified in previous studies focused on the etiology of childhood anxiety disorders [
15].
To respond to these challenges, research into parent-focused interventions for childhood anxiety disorder is increasing. This type of intervention has the potential to avoid the problems mentioned above. However, it remains unclear whether parent-only CBT interventions are effective for treating children and adolescents with anxiety disorder, and previous studies have produced conflicting findings [
13,
16‐
18]. Therefore, we designed a conventional meta-analysis to determine the effectiveness of parent-only CBT to treat anxiety disorder in children and adolescents, compared with WL or CBT with parents as comparison group.
Discussion
Anxiety disorder is a severe disease among children and adolescents, which can threaten academic and social competence [
2,
3]. Parent-only CBT is an important and novel treatment for anxiety disorder in children and adolescents. In the current study, we identified RCTs of parent-only CBT for analysis. Given the limited number of included studies, we sought to enhance the validity of our conclusions by conducting two associative pair-wise meta-analyses, including a WL control group, and comparing groups undergoing CBT with parents, and parent-only CBT. In both of the comparison groups, we assessed efficacy using mean change scores on the anxiety rating scale from baseline to post-treatment. Acceptability was represented by the proportion of participants who did not meet the standardized diagnostic criteria of anxiety disorders when treatment was finished. We then assessed remission rate and conducted subgroup analysis in the control group only.
Regarding efficacy, the results suggested that, compared with the WL control condition, parent-only CBT is an effective treatment for reducing anxiety symptoms and relieving anxiety in children, leading to remission at the end of treatment. The findings in this pair-wise meta-analysis were consistent with a previously reported network meta-analysis [
30]. The network meta-analysis included studies in which more than 20% of children took psychotropic drugs, and revealed that parent-only CBT led to better outcomes than WL control condition in children with various types of anxiety disorders. Comparison revealed parent-only CBT has mild weakly (without significant difference) efficacy than CBT involving parents. According to previous studies [
30,
31], CBT involving parents was effective for treating child anxiety disorders. Particularly for early childhood anxiety, CBT involving parents is reported to be more beneficial for young children than for older children because of their limited language and cognitive competence [
32]. In the current study, parent-only CBT had the mild weakly (without significant difference) efficacy than CBT with parents, and was efficacious compared with the WL condition. Previous study [
10] which reported child-CBT remission rate (48.47%) supported the remission of parent-only CBT (37.96%)was mild weak than child-CBT. And our results regarding the two comparison groups were consistent and in accord other child-CBT (without significant difference), suggesting that parent-only CBT is one of effective treatments for anxiety disorder in children and adolescents.
To determine the influence of various conditions on the primary efficacy outcome, we conducted subgroup analysis of male/female, high/unclear risk and self/other-rated patients, between the parent-only and WL groups. Regarding male/female differences, the results revealed more significant improvements in boys than girls. An early study of 79 children with anxiety in 1996 reported gender differences in the way parents interacted with anxious children, indicating that younger, female children benefitted more from parental involvement [
33]. It is inconsistent with our finding. Therefore confirming this finding will require further research in future. Regarding high/unclear risk, excluding one high-risk study [
29] changed the efficacy of the outcome. This finding highlighted the need for caution when interpreting the current results, and the importance of further studies to confirm our conclusions. When subgroups depended on self/other-rating scales, excluding one study [
17] that measured anxiety in children using an other-rated scale (clinical severity rating, CSR, doctor-rated) resulted in different effects. This result may related to overstatement of improvement of anxiety symptoms by doctors. According to a previous study using three kinds of rating scales (doctor-rated, parent-rated and child-rated) to measure anxiety in the same children, the doctor-rated scale produced the least similar results among the three kinds of rating scales, while the parent-rated scale showed smaller differences than the doctor-rated scale, and the self-rated scale showed no differences [
34]. This phenomenon is consistent with our speculation that findings may be overstated when doctor-rated scales are used to examine children’s anxiety.
Interestingly, for the primary outcome of efficacy(parent-only CBT compared with WL), we realized significant heterogeneity. Then we performed sensitivity analysis. We excluded the study of Cartwright-Hatton (2011), which made heterogeneity fromdwon to and p-value from to. We investigated deeply into the study of Cartwright-Hatton (2011). we found that the children relatively young and MASC was adopted. But MASC was developed for children 8 years and older. The self-rated scale MASC may do not inappropriate to anxiety in young children. For example, the studies (Waters 2009 and Monga 2015) included young children adopted other-rated scale.
Regarding acceptability, we found no significant differences between the parent-only CBT and WL conditions. However, more families tended to drop out of treatment in the parent-only group compared with the CBT with parents group. This result is similar to those of other studies investigating internet-based delivery and bibliotherapy as alternative modes of CBT treatment [
35‐
37]. It is possible that parents did not have sufficient trust in the efficacy of parent-only CBT because their children were not directly involved in the treatment, resulting in a tendency to drop out early.. And the results of a previous study suggest that the additional responsibility in the parent-only condition may explain the tendency to drop out in the parent-only condition. This explanation supports the importance of assessing the level of sense of responsibility of parents and enhancing it prior to commencing treatment [
17]. However, the conclusions that can be drawn from the current findings regarding acceptability are limited due to the small sample size.
In the current study, we did not investigate the effects of parent-only CBT in young children and older children, respectively, due to a lack of studies. According to previous studies of CBT with parents in young children [
32], family-based CBT in which parents are highly involved is a well-established effective intervention for early childhood anxiety. Thus, future studies should investigate whether parent-only CBT is a similarly effective treatment, which could be more beneficial for young children than the older. Moreover, in the etiology of childhood anxiety, the influence of parents’ own anxiety levels is important and well recognized [
38]. In the current meta-analysis, only two studies reported scale score change of parents’ own anxiety levels from pre-treatment to post-treatment. Waters reported that parents with high anxiety scores were more likely to drop out, both in the intervention group and the control group, but only a non-significant trend was observed on the DASS-42 Anxiety subscales from pre-treatment to post-treatment [
17]. And Ozyurt reported a significant improvement in parental anxiety in the intervention group from pre-treatment to post-treatment [
29]. No previous studies have explored the differences between implementing parent-only CBT for children with anxiety when parents met the diagnostic criteria for anxiety or depression. Elucidating these issues will require more RCTs in future.
The current study involved several limitations that should be considered. First, the sample size was not sufficient to ensure reliable statistical power, particularly in subgroup analyses. In addition, the unsatisfactory quality of some of the included studies limited the reliability of the conclusions, and the studies included in the review exhibited substantial heterogeneity. Therefore, caution is required when interpreting the current findings. Moreover, other types of CBT involving parental participation were not taken into consideration, such as parent-delivered CBT, internet-delivered CBT with parents, and telephone-delivered CBT with parents. We did not investigate the efficacy of parent-only CBT for specific types of anxiety in children. Elucidating these issues will require further investigation. Due to a lack of data in the included studies, we did not examine follow-up assessment results. Resolving this shortcoming will require future studies.
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