Physical activity and chronic diseases among older people in a mid-size city in China: a longitudinal investigation of bipolar effects

Table 5 ^aOnset median age (MA) of chronic diseases and hazard ratio (HR) with different levels/years of PA

		Model 1^c: PA level			Model 2^d: Cumulative PA years					N of obs.	N of sub.
		NPA	IPA	RPA	0	1	2	3	4	N of obs.	N of sub.
All Onset	MA	56	63***^e	65***	61	62	63**	66***	66***	3414	1657
All Onset	HR^b	1	0.31	0.4	1	0.8	0.63	0.46	0.21
Obesity	MA	56	64***	66***	61	61	64	63	66	540	257
Obesity	HR	1	0.43	0.28	1	0.68	0.83	1.06	0.96
Hypertension	MA	55	62***	67***	60	61*	62**	65***	67***	733	376
Hypertension	HR	1	0.26	0.27	1	0.59	0.41	0.31	0.14
Diabetes	MA	55	66***	63**	63	60*	64***	65***	68***	1069	472
Diabetes	HR	1	0.17	0.6	1	0.61	0.46	0.27	0.11
Hyperlipidemia	MA	56	63***	66***	62	64**	63	66*	66***	1143	515
Hyperlipidemia	HR	1	0.21	0.28	1	0.57	0.77	0.52	0.31
Cardiovascular diseases	MA HR	56	71***	61**	62	63**	62***	66***	68***	1965	849
Cardiovascular diseases	MA HR	1	0.17	0.71	1	0.67	0.53	0.36	0.16
Liver and biliary system diseases	MA	57	66***	62***	62	63	63	66	66	675	292
Liver and biliary system diseases	HR	1	0.13	0.44	1	0.97	1.59	1.49	0.95
Kidney function disorder	MA	59	74***	65	68	67	67	68*	68**	94	39
Kidney function disorder	HR	1	0.17	0.8	1	0.7	0.52	0.3	0.15

^aTwo Cox proportional hazards models with time-varying covariates were used to examine the impact of PA on the onset of chronic diseases controlling for gender, education level, income level and other types of chronic diseases
^bFor each disease, the two rows report the dependent variables-onset of different diseases by onset median age (MA) and hazard ratio (HR)
^cIn model 1, the PA level was the independent variable (NPA: sedentary; IPA: irregular physical activity; RPA: Regular physical activity)
^dIn model 2 the cumulated PA years was the independent variable
^e*p < 0.05, **p < 0.01, ***p < 0.001

ISSN: 1471-2458