Table 1.

Daily weather conditions, YLL and death counts of COPD in Ningbo, China, 2011–2015

Variables	Mean ± SD	Minimum	25th	Median	75th	Maximum
PM2.5 (μg/m3)	49.58 ± 32.36	5.86	28.25	41.73	61.25	421.71
PM10 (μg/m3)	78.59 ± 48.19	12.86	44.94	66.33	97.97	543.88
SO2 (μg/m3)	21.34 ± 13.84	5.38	12.14	16.94	25.73	112.6
NO2 (μg/m3)	43.41 ± 18.65	7.62	30.12	40.61	55	121.8
Temperature (°C)	17.49 ± 8.94	−1.67	10	18.89	24.44	34.44
Relative humidity (%)	76.41 ± 12.25	31	68	77	86	100
Years of life lost (years)
Total	80 ± 40	0	51	73	102	278
Age < 75 years	19 ± 20	0	0	13	30	136
Age ≥ 75 years	61 ± 30	0	39	55	77	227
Male	46 ± 27	0	26	42	62	174
Female	34 ± 22	0	17	30	46	161
Married	44 ± 27	0	24	39	59	175
Widowed	33 ± 20	0	18	29	45	144
Daily death counts (No. of deaths)
Total	10 ± 5	0	7	9	13	34
Age < 75 years	1 ± 1	0	0	1	2	8
Age ≥ 75 years	9 ± 4	0	6	8	11	33
Male	6 ± 3	0	3	5	7	18
Female	5 ± 3	0	3	4	6	20
Married	5 ± 3	0	3	4	7	19
Widowed	5 ± 3	0	3	5	7	20