Questionnaires
Codebook
Sampling
Sample area |
Nationwide |
Sample population |
Men and women 20-89 years of age living in Japan |
Sample size |
8,000 |
Sampling method |
Two-stage stratified random sampling;stratified by regional block and population size
No. of survey points:529
No. of subjects at each survey point:13-16 |
Administration
JGSS-2008 was conducted from the beginning of October through December 2008. The fieldwork was entrusted to the Central Research Services Inc. (Chuo-Chosa-sha).
As for JGSS conducted before, JGSS-2008 used both interview and placement (self-administered) method for each respondent. There were two forms of self-administered questionnaire: Form A and Form B. Form A mainly consists of replicating core questions and topical modules. Form B mainly consists of the EASS module. Form A was randomly distributed to a half of the sample, and Form B was distributed to the rest of the sample.
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 |
Form A |
1,752(85.0) |
281(13.6) |
27(1.3) |
2,060(100.0) |
Form B |
1,868(86.5) |
257(11.9) |
35(1.6) |
2,160(100.0) |
TTL |
3,620(85.8) |
538(12.7) |
62(1.5) |
4,220(100.0) |
Response Rate
|
Form A |
Form B |
No. of respondents contacted |
3,997 |
4,003 |
No. of valid responses |
2,060 |
2,160 |
No. of nonresponses or invalid responses |
1,937(change of address:148, address unknown:84, death:7, long term absence:74, sickness:82, in hospital:45, other:18) |
1,843(change of address:154, address unknown:78, death:6, long term absence:63, sickness:86, in hospital:31, other:19) |
Response Rate |
58.2% |
60.6% |
Responses by Sex and Age:Form A
No. of Responses(%) |
Age |
20-29 |
30-39 |
40-49 |
50-59 |
60-69 |
70-79 |
80-89 |
TTL |
Male |
79 (8.0) |
146 (14.9) |
164 (16.7) |
211 (21.5) |
221 (22.5) |
129 (13.1) |
32 (3.3) |
1982 (100.0) |
Female |
85 (7.9) |
196 (18.2) |
192 (17.8) |
225 (20.9) |
162 (15.0) |
162 (15.0) |
56 (5.2) |
1,078 (100.0) |
TTL |
164 (8.0) |
342 (16.6) |
356 (17.3) |
436 (21.2) |
383 (18.6) |
291 (14.1) |
88 (4.3) |
2,060 (100.0) |
Responses by Sex and Age:Form B
No. of Responses(%) |
Age |
20-29 |
30-39 |
40-49 |
50-59 |
60-69 |
70-79 |
80-89 |
TTL |
Male |
121 (12.1) |
175 (17.4) |
143 (14.2) |
185 (18.4) |
213 (21.2) |
136 (13.5) |
31 (3.1) |
1,044 (100.0) |
Female |
125 (10.8) |
174 (15.1) |
186 (16.1) |
220 (19.0) |
237 (20.5) |
161 (13.9) |
553 (4.6) |
1,156 (100.0) |
TTL |
246 (11.4) |
349 (16.2) |
329 (15.2) |
405 (18.8) |
450 (20.8) |
297 (13.8) |
84 (3.9) |
2,160 (100.0) |
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