Table 3 The disparity in ASMR of CBD (1/100,000 people) across seven levels of urbanization

Metropolis Core(N = 25)

25.00 ± 6.82

24.95 ± 5.85

23.24 ± 5.06

21.54 ± 6.11 (-13.84%)*

Industrial and commercial urban(N = 40)

27.62 ± 5.67

28.27 ± 5.73

25.00 ± 5.24

23.69 ± 5.37 (-9.49%)

Emerging towns(N = 73)

35.47 ± 7.59

32.21 ± 6.92

30.02 ± 7.41

27.30 ± 5.73 (-15.40%)

Traditional industrial towns(N = 47)

36.08 ± 8.27

37.39 ± 11.60

33.26 ± 9.37

29.39 ± 10.68 (-7.82%)

Low-level development townships(N = 93)

36.02 ± 12.49

34.23 ± 12.10

31.70 ± 12.77

30.36 ± 11.54 (-12.00%)

Aging townships(N = 40)

37.00 ± 12.20

33.95 ± 11.04

30.07 ± 9.89

33.25 ± 10.69 (-18.72%)

Remote townships(N = 41)

63.24 ± 30.46

73.75 ± 40.48

59.23 ± 35.97

57.90 ± 31.00 (-6.34%)