 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) |
|
