Table 1 Distribution of selected characteristics in 1354 parent–child pairs, Kyushu Okinawa Maternal and Child Health Study, Japan
Variable | No. (%) or mean ± SD |
|---|---|
Baseline characteristics | |
Region of residence | |
Fukuoka Prefecture | 783 (57.8) |
Other than Fukuoka Prefecture in Kyushu | 442 (32.6) |
Okinawa Prefecture | 129 (9.5) |
No. of living children already born to same mother | |
0 | 541 (40.0) |
1 | 543 (40.1) |
≥ 2 | 270 (19.9) |
Maternal education, years | |
< 13 | 293 (21.6) |
13 − 14 | 455 (33.6) |
≥ 15 | 606 (44.8) |
Paternal education, years | |
< 13 | 409 (30.2) |
13 − 14 | 198 (14.6) |
≥ 15 | 747 (55.2) |
Household income, yen/year | |
< 4,000,000 | 454 (33.5) |
4,000,000 − 5,999,999 | 497 (36.7) |
≥ 6,000,000 | 403 (29.8) |
Maternal history of asthma | 179 (13.2) |
Maternal history of atopic eczema | 246 (18.2) |
Maternal history of allergic rhinitis | 564 (41.7) |
Paternal history of asthma | 147 (10.9) |
Paternal history of atopic eczema | 133 (9.8) |
Paternal history of allergic rhinitis | 374 (27.6) |
Characteristics at follow-up surveys | |
Male sex | 646 (47.7) |
Birth weight, mean ± SD, g | 3002.3 ± 395.5 |
Breastfeeding duration, mo | |
< 6 | 156 (11.5) |
≥ 6 | 1198 (88.5) |