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JGSS-2001

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Sampling

Sample area Nationwide
Sample population Men and women 20-89 years of age living in Japan
Sample size 4,500
Sampling method Two-stage stratified random sampling; stratified by regional block and population size
No. of survey points:300
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 2001. The fieldwork was entrusted to the Central Research Services Inc. (Chuo-Chosa-sha).
As for the two preceding pilot surveys and JGSS-2000, JGSS-2001 used both interview and placement method for each respondent. 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(%)
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Self-administered
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Interview
No answer TTL
2,115(75.8) 555(19.9) 120(4.3) 2,790(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 4,822(Including 349 supplement)
No. of valid responses 2,790
No. of nonresponses or invalid responses 2,032(change of address:249, address unknown:84, death:16, sampling mistake:2)
Response Rate 63.1%(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 170
(13.3)
182
(14.2)
212
(16.5)
276
(21.5)
232
(18.1)
169
(13.2)
42
(3.3)
1,283
(100.0)
Female 161
(10.7)
212
(14.1)
248
(16.5)
339
(22.5)
277
(18.4)
193
(12.8)
77
(5.1)
1,507
(100.0)
TTL 331
(11.9)
394
(14.1)
460
(16.5)
615
(22.0)
509
(18.2)
362
(13.0)
119
(4.3)
2,790
(100.0)
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