Table 2.
Estimated (Adjusted) Geometric Means and 95% Confidence Intervals of Urinary 6-Sulfatoxymelatonin (aMT6s) by Lifestyle Factors in the Early Morning Urine Samples, SWHS, Shanghai, China*
| Lifestyle Factors | N | Geometric mean (ng/mg Cr) | 95% CI† |
|---|---|---|---|
| Age at Sample Collection(yr) | |||
| 40-<45 | 41 | 6.32 | (3.47, 11.51) |
| 45-70 | 32 | 5.55 | (3.35, 9.20) |
| P for difference | 0.57 | ||
| Education | |||
| 1 = College + | 17 | 7.49 | (4.16, 13.50) |
| 2 = High School | 24 | 4.78 | (2.54, 9.00) |
| 3 = Middle School & Less | 32 | 5.80 | (3.31, 10.16) |
| P for trend | 0.33 | ||
| BMI (Kg/M2)‡ | |||
| Q1 (<=21.1) | 19 | 6.45 | (3.42, 12.17) |
| Q2 (>21.1-<=22.9) | 18 | 6.13 | (3.14, 11.96) |
| Q3 (>22.9-<=25.4) | 17 | 8.35 | (4.74, 14.71) |
| Q4 (>25.4) | 19 | 3.73 | (2.06, 6.73) |
| P for trend | 0.06 | ||
| Ever alcohol consumption | |||
| Yes | 2 | 4.29 | (1.59, 11.59) |
| No | 71 | 8.18 | (5.57, 12.02) |
| P for difference | 0.25 | ||
| Number of live births | |||
| 0-1 | 62 | 6.95 | (3.75, 12.89) |
| 2+ | 11 | 5.05 | (2.62, 9.73) |
| P for difference | 0.41 | ||
| Menopausal status | |||
| Pre-menopause | 10 | 5.59 | (3.27, 9.56) |
| Post-menopause | 63 | 6.28 | (3.26, 12.10) |
| P for difference | 0.72 | ||
| Cortisol‡ | |||
| Q1 (<=136.5) | 18 | 9.16 | (5.04, 16.64) |
| Q2 (>136.5-<=197.9) | 19 | 6.21 | (3.46, 11.13) |
| Q3 (>197.9-<=297.1) | 18 | 4.12 | (2.19, 7.77) |
| Q4 (>297.1) | 18 | 5.26 | (2.79, 9.89) |
| P for trend | 0.05 |
*
Geometric mean of creatinine-adjusted 6-sulfatoxymelatonin (aMT6s) urinary concentration controlled for all covariates listed.
†
95% confidence interval.
‡
Quartiles of BMI and cortisol levels were cut according to their distributions in the early morning urine samples