Association of air pollution with postmenopausal breast cancer risk in UK Biobank

Breast Cancer Research

Table 1 Distribution of air pollution measures in the study sample

Air pollutant (μg/m³)	N	Mean	SD	Minimum	25th Percentile	Median	75th Percentile	Maximum
NO₂ 2005	154,777	29.56	9.93	6.66	22.87	28.04	34.33	126.67
NO₂ 2006	154,777	28.63	9.03	6.77	22.60	27.60	32.97	129.44
NO₂ 2007	154,777	30.36	10.54	6.99	23.40	28.58	34.59	138.39
NO₂ 2010	154,777	26.41	7.45	12.93	21.24	25.95	30.91	107.47
PM₁₀ 2007	154,411	22.00	2.86	11.81	20.14	21.72	23.54	36.56
PM₁₀ 2010	143,655	16.20	1.89	11.78	15.22	16.01	16.98	30.65
PM_2.5 2010	143,655	9.95	1.04	8.17	9.26	9.90	10.52	21.31
PM_{2.5 absorbance} 2010	143,655	1.18	0.27	0.83	0.99	1.12	1.29	4.57
PM _{coarse 2.5–10} 2010	143,655	6.42	0.90	5.57	5.84	6.10	6.63	12.25
NOx 2010	154,777	43.52	15.15	19.74	33.98	41.95	50.17	265.94

NO₂, Nitrogen dioxide; NOx, Nitrogen oxide; PM₁₀, particulate matter ≤ 10 µm in diameter; PM_2.5, particulate matter ≤ 2.5 µm in diameter; PM_{2.5 absorbance}, particulate matter ≤ 2.5 µm in diameter absorbance; PM _{coarse 2.5–10}, particulate matter between 2.5 and 10 µm in diameter; SD, Standard deviation

ISSN: 1465-542X