Table 2 Anthropometric, reproductive, and lifestyle characteristics of women across PM10 groups
From: Joint effect of particulate matter and cigarette smoke on women’s sex hormones
Characteristics | Level | Statistics | PM10 exposure | Test | |
|---|---|---|---|---|---|
Low | High | ||||
Age [years] | N | 60 | 70 | t test; df = 128; p = 0.032 | |
Mean | 28.9 | 30.1 | |||
SD | 2.8 | 3.3 | |||
Age at first child [years] | N | 20 | 30 | t test; df = 48; p = 0.570 | |
Mean | 24.5 | 23.9 | |||
SD | 2.3 | 3.6 | |||
Parity status | No | N | 40 | 40 | Pearson Chi-square: 1.2, df = 1, p = 0.266 |
% | 66.7 | 57.1 | |||
Yes | N | 20 | 30 | ||
% | 33.3 | 42.9 | |||
Menarcheal age [years] | N | 60 | 68 | t test, separate variance estimates; df = 106; p = 0.060 | |
Mean | 13.5 | 13.0 | |||
SD | 1.6 | 1.2 | |||
Cycle length [days] | N | 61 | 70 | Mann–Whitney U test, p = 0.115 | |
Median | 29.0 | 27.5 | |||
IQR | 26.0–32.0 | 26.0–30.0 | |||
Height [cm] | N | 61 | 70 | t test; df = 129; p = 0.715 | |
Mean | 164.3 | 164.7 | |||
SD | 6.0 | 6.1 | |||
Body fat [%] | N | 60 | 69 | t test; df = 127; p = 0.104 | |
Mean | 26.1 | 24.3 | |||
SD | 5.4 | 6.5 | |||
Body mass index* [kg/m2] | N | 61 | 70 | Mann–Whitney U test, p = 0.076 | |
Median | 22.5 | 20.8 | |||
IQR | 20.3–24.3 | 19.9–23.3 | |||
Body weight [kg] | N | 60 | 70 | t test; df = 128; p = 0.282 | |
Mean | 60.8 | 59.1 | |||
SD | 8.1 | 9.0 | |||
Marital status | Single | N | 24 | 26 | Pearson Chi-square = 0.2; df = 1, p = 0.681 |
% | 40.7 | 37.1 | |||
Ever married | n | 35 | 44 | ||
% | 59.3 | 62.9 | |||
Smoking status | Non-smoker | N | 43 | 60 | Pearson Chi-square = 3.4, df = 1, p = 0.066 |
% | 74.1 | 87.0 | |||
Smoker | N | 15 | 9 | ||
% | 25.9 | 13.0 | |||
Living with smoker | No | N | 38 | 54 | Pearson Chi-square = 2.6, df = 1, p = 0.109 |
% | 65.5 | 78.3 | |||
Yes | N | 20 | 15 | ||
% | 34.5 | 21.7 | |||
Total Smoke Exposure | nSM | N | 32 | 51 | Pearson Chi-square = 4.9, df = 1, p = 0.027 |
% | 55.2 | 73.9 | |||
SM | N | 26 | 18 | ||
% | 44.8 | 26.1 | |||