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JGSS-2003

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Sampling

Sample area Nationwide
Sample population Men and women 20-89 years of age living in Japan
Sample size 7,000
Sampling method Two-stage stratified random sampling; stratified by regional block and population size
No. of survey points:489
No. of subjects at each survey point:12-15(15 on average)
No. of supplement subjects at each survey point:5

Administration

JGSS-2003 was conducted from late October through mid-November 2003. The fieldwork was entrusted to the Central Research Services Inc. (Chuo-Chosa-sha).
As for JGSS conducted before, JGSS-2003 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 consists of replicating core questions and topical modules. Form B consists of some core questions and those on social network. Form A was randomly distributed to a half of the sample, and Form B was distributed to the rest of the sample.
or respondents with Form A, the administrative order (i.e., whether to conduct the face-to-face interview before or after the questionnaire) was determined by the interviewer depending on the circumstances of each case. In any case the administrative order was recorded for each respondent. For respondents with Form B, the face-to-face interview was conducted before the questionnaire.
When the first targeted individual is not available due to sickness, hospitalization, absence from home during the survey period, death, change of address or unidentifiable address, a supplementary target starting from the top of the list of supplements was used.

No. of Responses(%)
  Interview >>>
Self-administered
Self-administered >>>
Interview
No answer TTL
Form A 1,712(87.5) 213(10.9) 32(1.6) 1,957(100.0)
Form B 1,671(97.9) 4(0.2) 31(1.8) 1,706(100.0)
TTL 3,383(92.4) 217(5.9) 63(1.7) 3,663(100.0)

Response Rate

No. of respondents contacted 4,039(Including 461 supplement) 4,044(Including 422 supplement)
No. of valid responses 1,957 1,706
No. of nonresponses or invalid responses 2,082(change of address:140, address unknown:76, death:8, long term absence:104, sickness:91, in hospital:52, other:11) 2,338(change of address:156, address unknown:81, death:8, long term absence:83, sickness:78, in hospital:49, other:8)
Response Rate 55.0%(calculated only by original sample) 48.0%(calculated only by original sample)

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 110
(12.7)
114
(13.1)
120
(13.8)
167
(19.2)
195
(22.4)
131
(15.1)
32
(3.7)
869
(100.0)
Female 104
(9.6)
168
(15.4)
183
(16.8)
206
(18.9)
215
(19.8)
165
(15.2)
47
(4.3)
1,088
(100.0)
TTL 214
(10.9)
282
(14.4)
303
(15.5)
373
(19.1)
410
(21.0)
296
(15.1)
79
(4.0)
1,957
(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 78
(10.8)
99
(13.7)
101
(14.0)
131
(18.1)
180
(24.9)
110
(15.2)
23
(3.2)
722
(100.0)
Female 90
(9.1)
166
(16.9)
145
(14.7)
201
(20.4)
214
(21.7)
128
(13.0)
40
(4.1)
984
(100.0)
TTL 168
(9.8)
265
(15.5)
246
(14.4)
332
(19.5)
394
(23.1)
238
(14.0)
63
(3.7)
1,706
(100.0)
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