Impact of ambient air pollution on physical activity and sedentary behavior in children

BMC Public Health

Table 2 Air quality index, PM_{2.5 and PM10} categories during the study period by day

	Level	Alarm	Levels of health concern	Value range	N	%
AQI					1,538	100
	1	Green	Good	0–50	1,076	69.96
	2	Yellow	Moderate	50.1–100	368	23.93
	3	Orange	Unhealthy for sensitive groups	100.1–150	79	5.14
	4	Red	Unhealth	150.1–200	15	0.97
PM_2.5 (µg/m³)					1,538	100
	1	Green	Good	1–15	673	43.76
	2	Green	Good	15.1–25	288	18.72
	3	Yellow	Moderate	25.1–37.5	201	13.07
	4	Orange	Unhealthy for sensitive groups	37.6–50	237	15.41
	5	Red	Unhealth	50.1–75	61	3.97
	6	Purple	Very unhealthy	75.1–150	78	5.07
PM₁₀ (µg/m³)					1,538	100
	1	Green	Good	11–45	1,093	71.07
	2	Green	Good	45–50	109	7.09
	3	Yellow	Moderate	50.1–75	233	15.15
	4	Orange	Unhealthy for sensitive groups	75.1–100	19	1.23
	5	Red	Unhealth	100.1–150	84	5.46
Temperature (°C)					1,538	100
	1			-9.5–5	174	11.31
	2			-4.9-0	1,193	77.57
	3			0.1-5	121	7.87
	4			6–11	50	3.25
					1,538	100
Rain (%)	Yes				70	4.55
Rain (%)	No				1,468	95.45

ISSN: 1471-2458