Table 1. Summary statistics for demographic and geographic characteristics, climatic factors, and diarrhoea seasonal parameters of the 31 provinces in China.

Region	Latitude	Longitude	PGRPa	Temperature (°C)	Humidity (%)	Rainfall (mm)	Peaktb	Peakcc	Peakad	Lowte	Lowcf	Lowag	Amplitudeth	Amplitudeci	Amplitudeaj
Anhui	31.8	117.5	17121.6	17	74	32	30.7	34.8	29.3	4.7	8.8	3.2	1.01	0.76	1.28
Beijing	39.9	116.4	66148.96	13	51	23	30.5	32.2	30.1	4.5	6.2	4.1	1.31	0.78	1.52
Chongqing	29.6	106.6	23416.73	19	78	35	39.3	43.5	31.7	13.3	17.5	5.7	0.39	0.62	0.39
Fujian	25.3	118.8	33568.41	21	70	33	42.5	46	33.2	16.5	20	7.2	0.62	0.98	0.65
Gansu	35.6	104.7	13814.94	9	54	27	32.3	39.2	27.2	6.3	13.2	1.2	0.33	0.39	0.5
Guangdong	22.9	113.4	39037.68	23	72	33	46.3	46.3	45.2	20.3	20.3	19.2	0.76	1.17	0.2
Guangxi	22.9	108.4	16876.84	21	76	35	45.8	46.9	35.3	19.8	20.9	9.3	0.33	0.48	0.08
Guizhou	27.4	106.8	11215.5	15	76	34	34.9	39.5	29.6	8.9	13.5	3.6	0.3	0.44	0.3
Hainan	19.6	110.1	20029.68	24	80	35	41.4	45.1	37.2	15.4	19.4	11.2	0.4	0.5	0.47
Hebei	38.1	115.8	24703.15	14	56	26	33.7	44.3	30.5	7.7	18.3	4.5	0.59	0.57	1.06
Heilongjiang	46.1	126.2	23631.59	6	64	27	33.3	44.3	29.8	7.3	18.3	3.8	0.28	0.19	0.8
Henan	34.7	113.1	20609.16	16	58	28	35.4	40.5	30.1	9.4	14.5	4.1	0.71	0.93	0.94
Hubei	30.9	112.6	23063.65	17	72	33	34	36.7	31.2	8	10.7	5.2	0.67	0.72	0.71
Hunan	27.4	113	20507.28	18	72	33	37.2	40	33.2	11.2	14	7.2	0.39	0.56	0.34
Mongolia	40.8	110.8	38372.48	8	46	21	28.4	35.2	20	2.4	9.2	50	1.68	0.11	2.58
Jiangsu	32.9	118.6	44292.88	16	71	33	31.3	36.3	29	5.3	10.3	3	0.51	0.45	1.05
Jiangxi	28.2	115.3	17904.59	19	69	34	36.9	38.6	30.9	10.9	12.6	4.9	0.56	0.53	0.67
Jilin	44.1	125.4	26497.15	6	61	27	33.2	33.5	32.4	7.2	7.5	6.4	0.58	0.74	0.43
Liaoning	40.7	122.6	35434.71	8	67	27	31.5	40.3	31.4	5.5	27.7	5.4	0.5	0.5	0.55
Ningxia	37.6	106	21880.91	10	51	23	32.2	32.3	30.2	6.2	6.3	4.2	0.71	0.77	0.97
Qinghai	36.6	101.8	20122.19	6	56	24	36.1	37.8	32.4	10.1	11.8	6.4	0.55	0.61	0.65
Shaanxi	34.3	108.8	22477.03	15	63	31	36.2	40.3	30.6	10.2	14.3	4.6	0.53	0.5	1.05
Shandong	36.3	118.4	34993.01	15	56	28	32.1	39.7	29.8	6.1	13.7	3.8	0.71	0.36	1.41
Shanghai	31.3	121.5	67924.76	17	69	31	33.9	42.6	33	7.9	16.6	7	1.22	0.83	1.43
Shanxi	37.8	112.8	22389.53	11	53	25	35.5	44	30.4	9.5	18	4.4	0.48	0.5	1.11
Sichuan	30.2	104	17798.11	16	76	30	33.5	38.7	29.8	7.5	12.7	3.8	0.35	0.35	0.45
Tianjin	39.2	117.2	62335.01	13	58	26	30.9	32.8	30.7	4.9	6.8	4.7	1.41	0.51	1.67
Tibet	29.7	91.1	11502.42	10	34	35	35.2	39	32.2	9.2	13	6.2	1.43	1.64	1.4
Xinjiang	43.8	87.6	21660.51	8	55	25	29.3	30.1	28.4	3.3	4.1	2.4	1.64	1.43	1.92
Yunan	24.8	103	13821.13	16	69	31	17.1	51.9	21.8	34.1	25.9	47.8	0.05	0.19	0.4
Zhejiang	30	120.4	44229.7	18	71	30	35	38.8	32	9	12.8	6	0.98	0.76	1.04

^aPer capita gross regional product;

^bPeak time in the total population;

^cPeak time in children <5 years;

^dPeak time in persons > = 5 years;

^eTrough time in the total population;

^fTrough time in children <5 years;

^gTrough time in persons > = 5 years;

^hAmplitude in the total population;

ⁱAmplitude in children <5 years;

^jAmplitude in persons > = 5 years.