Table 1 Characteristics of the study population
From: Levels of urinary isoflavones and lignan polyphenols in Japanese women
Characteristics | Total | Hokkaido | Miyagi | Kyoto | Kochi | Okinawa | p valuea |
|---|---|---|---|---|---|---|---|
Age (mean ± SD) | 49.2 ± 10.1 | 49.4 ± 10.7 | 50.1 ± 10.7 | 48.9 ± 9.4 | 49.3 ± 10.1 | 48.5 ± 9.9 | 0.8 |
Number of delivery (mean ± SD) | 1.9 ± 1 | 1.7 ± 0.9 | 2.0 ± 0.9 | 1.8 ± 0.9 | 1.9 ± 0.9 | 2.0 ± 1.4 | 0.3 |
Post menopause (%) | 37 | 34 | 33 | 46 | 36 | 37 | 0.6 |
Smoking habit (%) | |||||||
Non-smoker | 86 | 83 | 83 | 91 | 80 | 90 | 0.2 |
Current smoker | 11 | 13 | 15 | 8 | 15 | 7 | |
Ex-smoker | 3 | 4 | 2 | 1 | 5 | 3 | |