Background
Methods
Study population and data collection
The SF-36 questionnaire
Strategy for identification of type and determinants of missingness
Results
N | % | ||
---|---|---|---|
Socio-demographic data
| |||
Age (Yrs)
| |||
19 - 29 | 3831 | 17 | |
30 - 39 | 4519 | 20 | |
40 - 49 | 4670 | 21 | |
50 - 59 | 4066 | 18 | |
60 - 69 | 2766 | 12 | |
70 - 79 | 2026 | 9 | |
> 80 | 742 | 3 | |
Gender
| |||
Male | 12123 | 46 | |
Female | 10497 | 54 | |
Education
| |||
no diploma | 6392 | 28 | |
< high school graduate | 8217 | 37 | |
high school graduate | 5305 | 23 | |
university | 2706 | 12 | |
Occupation (present or past)
| |||
white collar | 14194 | 64 | |
blue collar | 6377 | 30 | |
no occupation | 1467 | 6 | |
French Nationality
| |||
yes | 20810 | 92 | |
no | 1810 | 8 | |
Health status data
| |||
Chronic disease
| |||
no | 19798 | 88 | |
yes | 2822 | 12 | |
Hospitalization in the year
| |||
no | 19580 | 87 | |
yes | 3040 | 13 | |
Vision disability
| |||
no | 21658 | 96 | |
yes | 962 | 4 | |
Depression (measured with the CES-D) | |||
no | 16378 | 72 | |
yes | 4694 | 21 | |
missing | 1548 | 7 | |
SF-36 questionnaire
| |||
Number of missing items
| |||
0 | 16597 | 74 | |
1 | 1640 | 7 | |
2-3 | 2103 | 9 | |
≥ 4 | 2280 | 10 | |
Subscales
|
median
|
mean
|
standard deviation
|
PF: Physical Functioning | 95 | 84 | 23 |
RP: Physical Role | 100 | 81 | 33 |
BP: Bodily Pain | 74 | 72 | 25 |
GH: Global Health | 69 | 67 | 19 |
VT: Vitality | 60 | 57 | 18 |
SF: Social Functioning | 87 | 79 | 23 |
RE: Role emotional | 100 | 81 | 34 |
MH: Mental Health | 68 | 66 | 18 |
Scales/Items | Proportion of missing | Independent predictors | Type of missingness |
---|---|---|---|
PF (Physical functioning)
| |||
PF1 Vigorous activities | 3.1% | Age, Gender, Hospitalization, Number of missing data for other items |
MAR
|
PF2 Moderate activities | 3.2% | Age, Number of missing data for other items, PF score |
MNAR
|
PF3 Lift, carry groceries | 3.3% | Age, Number of missing data for other items, PF and GH scores |
MNAR
|
PF4 Climb several flights | 3.6% | Age, Occupation, Number of missing data for other items, PF and VT scores |
MNAR
|
PF5 Climb one flight | 4.9% | Age, Occupation, Education, Number of missing data for other items, PF and VT scores |
MNAR
|
PF6 Bend, kneel | 3.3% | Age, French nationality, Number of missing data for other items, PF score |
MNAR
|
PF7 Walk>1 km | 3.1% | Age, French nationality, Number of missing data for other items, PF score |
MNAR
|
PF8 Walk several blocks | 4.5% | Age, Number of missing data for other items, PF and SF scores |
MNAR
|
PF9 Walk one block | 2.8% | Chronic disease, Number of missing data for other items, PF score |
MNAR
|
PF10 Bathe, dress | 5.4% | Age, Number of missing data for other items, PF and VT scores |
MNAR
|
RP (Role limitations relating to physical health )
| |||
RP1 Cut down time on work | 3.2% | Gender, Education, Number of missing data for other items, RE score |
MAR
|
RP2 Accomplished less | 3.2% | Number of missing data for other items, RP and GH scores |
MNAR
|
RP3 Limited in kind of work | 3.8% | Age, Number of missing data for other items, GH and RE scores |
MAR
|
RP4 Difficulty performing work | 3.5% | Age, French nationality, Number of missing data for other items, RP score |
MNAR
|
BP (Bodily pain)
| |||
BP1 Intensity of bodily pain | 2.4% | Number of missing data for other items, PF and BP scores |
MNAR
|
BP2 Extent pain interfered with work | 2.7% | Number of missing data for other items |
MAR
|
GH (General health perceptions)
| |||
GH1 General health | 6.4% | Age, Depression, Number of missing data for other items, SF score |
MAR
|
GH2 Get sick easier | 6.4% | Age, Number of missing data for other items, GH and SF scores |
MNAR
|
GH3 As healthy as anybody | 6.0% | Age, Hospitalization, Number of missing data for other items, GH score |
MNAR
|
GH4 Expect health to get worse | 6.1% | Age, Gender, French nationality, Number of missing data for other items |
MAR
|
GH5 Health is excellent | 6.8% | Age, Gender, Hospitalization, Number of missing data for other items, GH and SF scores |
MNAR
|
VT (Vitality)
| |||
VT1 Full of life | 5.6% | Age, Education, Vision disability, Depression, Number of missing data for other items |
MAR
|
VT2 Energy | 5.6% | Age, Occupation, Number of missing data for other items |
MAR
|
VT3 Worn out | 5.5% | Age, Number of missing data for other items, BP score |
MAR
|
VT4 Tired | 4.0% | Number of missing data for other items |
MAR
|
SF (Social functioning)
| |||
SF1 Extent of social activities interfered with | 2.6% | Gender, Number of missing data for other items, GH score |
MAR
|
SF2 Frequency of social activities interfered with | 3.0% | Age, Number of missing data for other items |
MAR
|
RE (Role limitation relating to mental health)
| |||
RE1 Cut down time on work | 3.7% | Age, Number of missing data for other items, GH and RE scores |
MNAR
|
RE2 Accomplished less | 3.6% | Age, Number of missing data for other items, VT score |
MAR
|
RE3 Did not do work as carefully | 6.3% | Occupation, Number of missing data for other items, RE score |
MNAR
|
MH (Mental health)
| |||
MH1 Nervous | 5.0% | Age, Number of missing data for other items, SF score |
MAR
|
MH2 Down in the dumps | 5.0% | Age, Number of missing data for other items |
MAR
|
MH3 Peaceful | 5.3% | Education, Vision disability, Number of missing data for other items |
MAR
|
MH4 Blue/sad | 5.2% | Gender, Depression, Number of missing data for other items, VT scale |
MAR
|
MH5 Happy | 5.2% | Age, Gender, Number of missing data for other items, GH scale |
MAR
|