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JGSS-2002

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Sampling

Sample area Nationwide
Sample population Men and women 20-89 years of age living in Japan
Sample size 5,000
Sampling method Two-stage stratified random sampling; stratified by regional block and population size
No. of survey points:341
No. of subjects at each survey point:15
No. of supplement subjects at each survey point:5

Administration

JGSS-2001 was conducted from late October through mid-November 2002. The fieldwork was entrusted to the Central Research Services Inc. (Chuo-Chosa-sha).
For practical reasons the administrative order (i.e., whether to conduct the face-to-face interview before or after the questionnaire) was determined by the interviewer/administrator depending on the circumstances of each case. In any case the administrative order was recorded for each respondent.

No. of Responses(%)
Interview >>>
Self-administered
Self-administered >>>
Interview
No answer TTL
2,244(76.0) 681(23.1) 28(0.9) 2,953(100.0)

The supplement samples were used only when the sample was unavailable due to either "death," "change of address," or "address unknown".

Response Rate

No. of respondents contacted 5,354(Including 354 supplement)
No. of valid responses 2,953
No. of nonresponses or invalid responses 2,401(change of address:257, address unknown:99, death:12, long term absence:74, sickness:105, in hospital:31, other:8)
Response Rate 62.3%(calculated only by original sample)

Responses by Sex and Age

No. of Responses(%)
Age 20-29 30-39 40-49 50-59 60-69 70-79 80-89 TTL
Male 166
(12.1)
186
(13.6)
219
(16.0)
327
(23.9)
269
(19.7)
161
(11.8)
39
(2.9)
1,367
(100.0)
Female 176
(11.1)
242
(15.3)
282
(17.8)
326
(20.6)
286
(18.0)
205
(12.9)
69
(4.4)
1,586
(100.0)
TTL 342
(11.6)
428
(14.5)
501
(17.0)
653
(22.1)
555
(18.8)
366
(12.4)
108
(3.7)
2,953
(100.0)
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