Study-level variables | Cochran Q test | I2 | Information criteria | Wald test | |||
---|---|---|---|---|---|---|---|
Q | P | % | AIC | BIC | Stat | P | |
Intercept-only | 75.93 | <0.001 | 63.12 | 66.67 | 85.32 | - | - |
Geographically factors | |||||||
 Latitude | 45.19 | <0.001 | 46.89 | 67.08 | 88.29 | 26.58 | <0.001 |
 Longitude | 57.60 | <0.001 | 58.34 | 78.88 | 100.09 | 17.60 | <0.001 |
 Height | 70.45 | <0.001 | 65.93 | 106.96 | 128.16 | 2.09 | 0.72 |
Demographic factors | |||||||
 Population density | 66.15 | <0.001 | 63.72 | 127.10 | 148.30 | 4.73 | 0.32 |
 The ratio of male to female | 73.47 | <0.001 | 67.33 | 91.38 | 112.59 | 2.37 | 0.67 |
 Ratio of children under five | 68.90 | <0.001 | 65.16 | 85.37 | 106.58 | 1.50 | 0.83 |
Socio-economic factors | |||||||
 GDP per capita | 68.19 | <0.001 | 64.80 | 160.55 | 181.76 | 4.61 | 0.33 |
 Living space per capita | 69.82 | <0.001 | 65.63 | 91.71 | 112.92 | 3.33 | 0.50 |
 Ratio of population flow | 66.72 | <0.001 | 64.03 | 100.33 | 121.53 | 4.63 | 0.33 |
Significant factors | |||||||
 Latitude and longitude | 29.30 | 0.08 | 31.74 | 82.22 | 104.13 | 40.45 | <0.001 |