Table 2 Results of Poisson Regression model for estimating the PRR (its 95% CI) between south and north region, and urban and rural areas of China

1

1

1

1

1.53 (1.30-1.81)

1.40 (1.14-1.73)

1.42 (1.07-1.90)

1.47 (1.31-1.66)

1

1

1

1

2.10 (1.81-2.43)

2.29 (2.01-2.60)

1.80 (1.42-2.28)

2.14 (1.96-2.34)

1

1

1

1

1.15 (0.99-1.34)

2.28 (1.93-2.69)

1.39 (1.08-1.77)

1.56 (1.41-1.72)

1

1

1

1

1.58 (1.35-1.84)

3.71 (3.10-4.45)

1.76 (1.34-2.31)

2.26 (2.04-2.52)

1

1

1

1

1.82 (1.63-2.04)

2.00 (1.71-2.24)

1.64 (1.36-1.97)

1.87 (1.74-2.01)

1

1

1

1

1.35 (1.21-1.50)

2.89 (2.56-3.26)

1.54 (1.29-1.85)

1.87 (1.74-2.01)