Air Pollutants, Climate, and the Prevalence of Pediatric Asthma in Urban Areas of China

Table 2

Levels of childhood asthma prevalence, air pollutants, and climatic factors in Chinese cities.

City	Asthma prevalence; (%)	Air pollutants			Climatic factors
		PM10; (mg/m^3)	SO2; (mg/m^3)	NO2; (mg/m^3)	Relative humidity (%)	Air temperature (°C)	Precipitation; (mm)	Hours of sunshine (h)
Beijing	344 (2.55)	0.121	0.033	0.055	51.0	12.93	41.80	203.95
Tianjin	273 (2.14)	0.099	0.055	0.043	58.5	12.53	38.40	185.24
Shijiazhuang	121 (1.23)	0.101	0.050	0.038	56.0	14.20	47.16	193.88
Taiyuan	124 (1.22)	0.098	0.072	0.021	53.0	11.18	41.74	202.58
Baotou	102 (0.90)	0.105	0.062	0.037	46.5	8.15	24.14	243.30
Shenyang	148 (1.62)	0.106	0.059	0.036	69.0	7.47	70.60	205.64
Changchun	187 (1.56)	0.087	0.032	0.044	63.0	5.63	56.64	196.35
Harbin	109 (1.03)	0.101	0.046	0.051	67.5	4.75	46.89	181.71
Shanghai	755 (5.73)	0.080	0.032	0.052	69.5	17.30	100.76	139.29
Nanjing	206 (1.60)	0.107	0.036	0.047	71.5	16.31	110.91	156.77
Hangzhou	496 (3.57)	0.098	0.038	0.054	71.5	17.60	132.58	141.63
Hefei	483 (5.18)	0.113	0.022	0.029	72.5	16.57	94.53	152.51
Fuzhou	479 (4.08)	0.069	0.012	0.036	72.0	20.53	124.13	128.80
Nanchang	240 (2.33)	0.083	0.055	0.040	71.5	18.65	145.37	156.43
Jinan	275 (2.02)	0.120	0.048	0.026	54.0	14.55	63.45	173.65
Zhengzhou	329 (3.19)	0.105	0.053	0.046	58.5	15.55	56.78	149.75
Wuhan	144 (2.12)	0.107	0.043	0.056	74.0	17.24	104.00	138.95
Changsha	229 (1.80)	0.088	0.040	0.044	73.0	18.36	118.46	146.52
Guangzhou	131 (1.12)	0.070	0.036	0.055	71.5	22.77	159.43	131.49
Nanning	275 (2.01)	0.060	0.030	0.029	76.0	22.01	97.50	139.80
Haikou	300 (2.90)	0.039	0.007	0.016	81.0	24.44	211.39	153.52
Chongqing	424 (3.64)	0.104	0.051	0.038	79.0	18.82	93.48	77.27
Chengdu	413 (3.42)	0.108	0.035	0.053	76.5	16.42	69.21	67.88
Guiyang	146 (1.38)	0.075	0.058	0.027	75.5	14.77	77.48	81.50
Kunming	104 (0.97)	0.070	0.041	0.046	66.0	16.63	59.79	181.16
Lhasa	21 (0.42)	0.049	0.008	0.021	32.0	10.14	29.33	265.81
Xi'an	219 (1.83)	0.120	0.046	0.046	63.0	14.83	44.57	147.91
Lanzhou	253 (2.39)	0.153	0.058	0.046	54.5	7.95	15.75	209.50
Xining	62 (1.01)	0.133	0.041	0.029	56.5	6.28	36.00	218.45
Yinchuan	29 (0.66)	0.092	0.042	0.029	49.5	10.38	16.10	232.91
Urumqi	121 (1.01)	0.137	0.091	0.068	56.0	7.70	26.48	235.45
Baoji	467 (4.36)	0.024	0.028	0.106	63.0	14.05	61.97	137.53
Yuxi	96 (0.59)	0.082	0.059	0.022	76.0	17.15	52.83	201.37
Yichang	286 (2.72)	0.086	0.046	0.025	75.5	17.35	105.99	101.83
Shenzhen	117 (1.63)	0.057	0.012	0.044	71.5	23.10	135.21	156.79
Zhongshan	139 (1.34)	0.052	0.029	0.040	79.0	22.60	165.94	153.77
Qingdao	337 (3.35)	0.099	0.052	0.046	63.8	13.00	57.47	183.21
Yantai	623 (4.74)	0.082	0.043	0.040	67.5	12.40	59.45	204.75
Linyi	60 (0.60)	0.112	0.082	0.049	63.6	13.84	58.01	185.46
Suzhou	352 (3.22)	0.090	0.034	0.052	69.0	17.20	89.10	149.67
Anqing	272 (2.97)	0.086	0.053	0.038	72.5	17.25	130.68	136.30
Wenzhou	250 (2.54)	0.081	0.028	0.056	73.5	18.70	163.53	126.50
Xiamen	236 (2.13)	0.063	0.021	0.043	74.0	21.10	130.70	164.96

Note. PM10: particulates with an aerodynamic diameter of 10 mm; SO₂: sulfur dioxide; NO₂: nitrogen dioxide.