Table 1.

Summary descriptive statistics on average number of daily non-accidental deaths and weather conditions in 272 Chinese cities, 2013-15

Variables	Mean (standard deviation)	Minimum value	25th centile	50th centile	75th centile	Maximum value
No of non-accidental deaths*
Total	16 (16)	3	7	12	20	165
Cardiovascular disease	8 (7)	1	3	6	10	65
Coronary heart disease	3 (3)	0	1	2	3	28
Stroke	4 (4)	0	2	3	5	33
Ischaemic stroke	1 (1)	0	0	1	2	8
Haemorrhagic stroke	2 (2)	0	1	1	2	17
Respiratory disease	2 (3)	0	1	1	3	34
Chronic obstructive pulmonary disease	2 (2)	0	0	1	2	29
Weather
Temperature (°C)	15 (5)	−0.5	12	16	18	25
Humidity (%)	68 (10)	35	61	71	77	91

^*Total=non-accidental deaths from all causes; cardiovascular disease includes coronary heart disease and stroke, stroke includes ischaemic stroke and haemorrhagic stroke, and respiratory disease includes chronic obstructive pulmonary disease.