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Table 1 Distribution of selected characteristics in 1745 pregnant women, Kyushu Okinawa Maternal and Child Health Study, Japan

From: Dietary meat and fat intake and prevalence of rhinoconjunctivitis in pregnant Japanese women: baseline data from the Kyushu Okinawa Maternal and Child Health Study

Variable n (%)
Age, years, mean ± SD 31.2 ± 4.3
Gestation, weeks, mean ± SD 18.5 ± 5.4
Region of residence  
   Fukuoka Prefecture 971 (55.6)
   Other than Fukuoka Prefecture in Kyushu 592 (33.9)
   Okinawa Prefecture 182 (10.4)
Having one or more older siblings 914 (52.4)
Having one or more children 1042 (59.7)
Having ever smoked 563 (32.3)
Ever experiencing secondhand smoke exposure at home 1315 (75.4)
Ever experiencing secondhand smoke exposure at work 1106 (63.4)
Family history of asthma 330 (18.9)
Family history of atopic eczema 303 (17.4)
Family history of allergic rhinitis 759 (43.5)
Household income, yen/year  
   < 4,000,000 632 (36.2)
   4,000,000-5,999,999 618 (35.4)
   ≥ 6,000,000 495 (28.4)
Education, years  
   < 13 428 (24.5)
   13-14 577 (33.1)
   ≥ 15 740 (42.4)
Body mass index, kg/m2, mean ± SD 21.4 ± 2.8