Table 1

Demographic factors associated with incident CVD and comorbid CVD

Variable	CVD		Comorbid CVD
Variable	RR (95%CI)	P value	RR (95%CI)	P value
Age group, year
60–69	Ref	Ref	Ref	Ref
70–79	2.34 (1.99 to 2,75)	<0.001	2.99 (2.10 to 4.25)	<0.001
≥80	3.33 (2.55 to 4.34)	<0.001	2.72 (1.44 to 5.13)	<0.001
Sex
Male	Ref	Ref	Ref	Ref
Female	1.49 (1.29 to 1.73)	<0.001	1.70 (1.23 to 2.35)	0.001
Province*
Henan	Ref	Ref	Ref	Ref
Heilongjiang	2.37 (1.53 to 3.57)	<0.001	2.94 (1.31 to 6.58)	0.009
Sichuan	0.58 (0.42 to 0.81)	0.001	0.42 (0.18 to 0.94)	0.034
Hunan	0.58 (0.39 to 0.86)	0.007	0.31 (0.06 to 0.56)	0.038
Yunnan	0.62 (0.41 to 0.93)	0.021	0.38 (0.12 to 1.14)	0.084
Jiangxi	0.58 (0.37 to 0.90)	0.011	0.51 (0.18 to 1.39)	0.186
Jiangsu	0.48 (0.32 to 0.73)	0.001	0.40 (0.14 to 1.10)	0.076
Guizhou	0.42 (0.19 to 0.94)	0.035	0.84 (0.27 to 5.28)	0.824
Chongqing	0.39 (0.20 to 0.80)	0.009	0.74 (0.21 to 2.64)	0.427
Guangxi	0.32 (0.18 to 0.57)	<0.001	0.38 (0.11 to 1.30)	0.123
Guangdong	0.24 (0.13 to 0.46)	<0.001	0.25 (0.06 to 1.07)	0.062
Zhejiang	0.20 (0.10 to 0.41)	<0.001	0.26 (0.06 to 1.13)	0.072
SES
Low	Ref	Ref	Ref	Ref
Lower middle	1.08 (0.89 to 1.31)	0.430	1.69 (1.06 to 2.71)	0.029
Upper middle	1.35 (1.08 to 1.68)	0.007	2.07 (1.25 to 3.45)	0.005
High	1.87 (1.11 to 3.15)	0.019	3.53 (1.37 to 9.07)	0.009

*Only showed provinces with statistically significant RRs of CVD or comorbid CVD.
CVD, cardiovascular disease; RR, relative risk; SES, socioeconomic status.