Table 2.

Anthropometric, reproductive, and lifestyle characteristics of women across PM10 groups

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

IQR interquartile range (Q1–Q3)

*Body mass index was calculated as a participant’s weight (in kilograms) divided by the square of participant’s height (in metres)