Table 1.

Singapore Chinese Health Study: characteristics of study participants (women only) in relation to parity and dietary soy intake

All womenIsoflavonoid intake lower than the medianIsoflavonoid intake higher than the median0-2 livebirths3+ livebirths
No. of subjects34,02817,01517,01311,97522,053
    Age at recruitment (y)56.2 (8.0)57.1 (8.2)55.4 (7.8)53.3 (7.4)57.8 (7.9)
    Dialect group (%)
        Cantonese47.948.147.657.742.5
        Hokkien52.151.952.442.357.5
    Educational level (%)
        No formal40.343.936.623.549.4
        Primary39.038.040.039.638.7
        Secondary and higher20.718.023.436.911.9
    BMI (kg/m2)23.2 (3.3)23.2 (3.3)23.3 (3.3)22.8 (3.3)23.5 (3.3)
Dietary intake (per day)
Mean, SD
    Total vegetables (g)109.9 (61.9)96.2 (53.3)123.6 (66.6)114.5 (64.3)107.5 (60.4)
    Total fruit and juices (g)194.0 (162.1)170.9 (150.7)217.1 (169.5)223.8 (174.2)177.8 (152.6)
    β-Cryptoxanthin (μg)240.4 (328.6)212.2 (313.4)268.6 (340.8)281.5 (352.3)218.1 (312.8)
    Total isothiocyanates (μmol)9.1 (6.9)7.9 (6.0)10.3 (7.4)9.5 (7.1)8.9 (6.7)
Smokers only
    No. of cigarettes/d (mean, SD)11.0 (8.9)11.0 (8.8)10.9 (9.0)10.6 (8.6)11.1 (9.0)
    Years of smoking (mean, SD)33.2 (12.8)33.7 (12.6)32.6 (13.0)32.4 (12.8)33.5 (12.7)