Table 2.

Daily mean PM10 levels during 30 days before recruitment.

Days before recruitment	Mean	SD	Median	IQR (percentiles)
				25th	75th
30 days	24.26	9.06	23.00	18.44	29.20
29 days	24.38	10.15	23.00	18.44	29.60
28 days	25.16	10.00	23.70	19.11	29.20
27 days	24.54	9.16	23.50	18.44	29.10
26 days	25.17	11.61	23.00	18.60	28.60
25 days	25.04	11.02	23.00	18.44	28.60
24 days	24.07	9.63	21.29	18.44	28.60
23 days	24.32	8.84	23.60	18.44	29.10
22 days	25.32	11.53	23.80	18.44	29.20
21 days	26.52	12.60	24.20	18.44	31.90
20 days	27.50	15.84	23.90	18.44	31.30
19 days	27.17	15.80	23.00	18.44	30.70
18 days	25.44	11.33	22.70	18.44	28.60
17 days	24.90	9.66	23.00	18.44	29.10
16 days	24.39	9.07	22.00	18.44	30.20
15 days	23.73	8.42	22.00	18.44	27.70
14 days	23.83	8.40	21.60	18.44	29.10
13 days	24.03	8.45	21.60	18.44	27.80
12 days	23.97	8.13	21.80	18.44	27.80
11 days	23.70	8.80	20.70	18.44	27.60
10 days	23.67	8.72	21.00	18.44	29.20
9 days	23.16	8.32	21.80	18.44	27.70
8 days	22.28	7.52	21.30	18.44	25.20
7 days	22.64	7.29	20.70	18.44	26.50
6 days	22.75	7.48	20.47	18.44	27.70
5 days	23.00	10.11	20.47	18.44	26.60
4 days	22.39	7.66	20.47	18.44	25.70
3 days	23.51	7.43	21.30	18.44	27.60
2 days	22.77	7.91	20.70	18.44	26.20
1 day	22.66	8.45	20.50	18.44	26.10
Day of recruitment	23.39	8.59	21.10	18.44	27.30

SD, standard deviation; IQR, interquartile range.