Identifying type and determinants of missing items in quality of life questionnaires: Application to the SF-36 French version of the 2003 Decennial Health Survey

Table 1 The 2003 Decennial Health Survey sample

	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

ISSN: 1477-7525