Table 3.
Relative risks a for the occurrence of menarche according to total soy and soy foods consumption at the continuous and categorical levels
| |
Continuous level (1/day) |
p-value |
Level of soy consumption
b
|
|||
|---|---|---|---|---|---|---|
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | |||
|
Total soy |
|
|
|
|
|
|
| Median intake, svg/wk |
|
|
0.0 |
4.5 |
13.5 |
24.2 |
| Median AOM, yrc |
|
|
12.6 |
12.4 |
12.5 |
12.6 |
| Relative risk |
0.99 (0.91, 1.07) |
0.770 |
1.00 Ref |
0.96 (0.66, 1.40) |
0.95 (0.64, 1.41) |
1.19 (0.79, 1.80) |
|
Meat alternatives |
|
|
|
|
|
|
| Median intake, svg/wk |
|
|
0.0 |
2.5 |
8.0 |
14.5 |
| Median AOM, yrc |
|
|
12.5 |
12.5 (12.5) |
12.8 (12.7) |
12.5 |
| Relative risk |
1.01 (0.90, 1.13) |
0.838 |
1.00 Ref |
0.92 (0.62, 1.36) |
1.02 (0.70, 1.48) |
1.07 (0.70, 1.65) |
| |
|
|
Non-consumers |
Low-moderate |
High |
|
|
Tofu/Traditional soy |
|
|
|
|
|
|
| Median intake, svg/wk |
|
|
0.0 |
1.0 |
4.8 |
|
| Median AOM, yrc |
|
|
12.5 |
12.6 |
12.4 |
|
| Relative Risk |
0.90 (0.70, 1.16) |
0.401 |
1.00 Ref |
0.93 (0.68, 1.26) |
1.00 (0.72, 1.40) |
|
|
Soy beverages |
|
|
|
|
|
|
| Median intake, svg/wk |
|
|
0.0 |
1.5 |
8.5 |
|
| Median AOM, yrc |
|
|
12.6 |
12.4 |
12.6 |
|
| Relative Risk | 0.98 (0.84, 1.14) | 0.759 | 1.00 Ref | 1.07 (0.79, 1.46) | 1.12 (0.82, 1.54) | |
aCox proportional hazards regression model adjusted for total food intake, age, site, type of school, mother’s and father’s education, mother’s and father’s ethnicity, meat intake, and BMI z-scores.
bLevels of consumption for total soy and meat alternatives are in quartiles while that for tofu/traditional soy and soy beverages are categorized as non-consumers (“0” soy consumption), low-to-moderate consumers (≤75th percentile excluding non-consumers) and high consumers (>75th percentile) due to more skewed distributions.
cAOM = age at onset of menarche, excludes those who have not reached menarche.