Table 1.
Distribution of selected characteristics in 1745 women, Kyushu Okinawa Maternal and Child Health Study, Japan, April 2007 to March 2008
| Variable | n (%) |
|---|---|
| Age, years, mean ± SD | 31.2 ± 4.4 |
| Gestation, weeks, mean ± SD | 18.5 ± 5.4 |
| Region of residence | |
| Fukuoka Prefecture | 970 (55.6) |
| Other than Fukuoka Prefecture in Kyushu | 593 (34.0) |
| Okinawa Prefecture | 182 (10.4) |
| Number of children | |
| 0 | 703 (40.3) |
| 1 | 690 (39.5) |
| ≥ 2 | 352 (20.2) |
| Nuclear family structure | 1474 (84.5) |
| Family income, yen/year | |
| < 4,000,000 | 633 (36.3) |
| 4,000,000–5,999,999 | 620 (35.5) |
| ≥ 6,000,000 | 492 (28.2) |
| Education, years | |
| < 13 | 430 (24.6) |
| 13–14 | 575 (33.0) |
| ≥ 15 | 740 (42.4) |
| Job typea | |
| Unemployed | 707 (40.5) |
| Professional or technical | 433 (24.8) |
| Clerical or related occupation | 328 (18.8) |
| Sales | 83 (4.8) |
| Service | 115 (6.6) |
| Production | 51 (2.9) |
| Othersb | 28 (1.6) |
| History of depression | 84 (4.8) |
| Family history of depression | 175 (10.0) |
a Full-time or part-time employment in the year when the first questionnaire was conducted or in the previous year
bManagement; protection services; farming, fishing, or forestry; transportation or communications; or construction