Table 4 Comparison of city-level characteristics between early diagnosis (n = 18,101) and delayed diagnosis (n = 65,843) in multilevel model (2014 to mid-2015, Guangdong Province)

 Total population (permanent residence)^b

1.04

0.79–1.37

0%

 % of agricultural population^c

1.03

0.51–2.06

0%

 % of urban population^bd

1.04

0.81–1.34

0%

 % of immigrants^d

7.78

2.12–28.54*

0%

 % of emigrants^d

5.05

1.13–22.47*

0%

 % of employed^c

1.60

0.67–3.84

1%

 Average annual earnings of the employed^b

1.00

0.74–1.34

0%

 GDP per capita^a

1.06

0.8–1.39

1%

 % of people covered by healthcare program^bc

1.14

0.92–1.41

6%

 No. of institutions per 10000 persons^c

0.85

0.65–1.11

4%

 No. of hospitals per 10000 persons^c

0.03

0–0.63*

9%

 No. of medical persons per10000 persons^bc

0.93

0.72–1.19

2%

 Total number of syphilis cases (2014 to mid-2015)^be

0.98

0.74–1.3

0%

 New diagnosis per 1000 persons (2014)^bcf

0.98

0.78–1.22

0%