Cognitive function and its transitions in predicting all-cause mortality among urban community-dwelling older adults

Table 2 Comparisons of all-cause mortality according to baseline cognitive status and one-year transition in cognitive status

Variables	N	Deaths	Person- years	Incidence rate	Age and sex -adjusted	Multivariate-adjusted^a	Multivariate-adjusted^b
Variables	N	Deaths	Person- years	Incidence rate	HR (95% CI)	HR (95% CI)	HR (95% CI)
Baseline MMSE score					0.91 (0.88, 0.94)***	0.91 (0.88, 0.94)***	0.93 (0.90, 0.97)***
Baseline cognitive status
Normal	779	108	5244.40	20.59	1.00	1.00	1.00
Impaired	142	52	849.34	61.22	2.60 (1.81, 3.73) ***	2.53 (1.76, 3.65)***	2.08 (1.43, 3.01)***
Total	921	160	6093.74	26.26
One-year transition in cognitive status
Normal-normal	393	31	2368.37	13.09	1.00	1.00	1.00
Normal-impaired	55	9	315.73	28.51	2.19 (1.02, 4.71)*	2.36 (1.07, 5.19)*	2.01 (0.88, 4.59)
Impaired-normal	31	9	168.36	53.46	3.27 (1.51, 7.09)**	3.60 (1.64, 7.90)**	2.87 (1.25, 6.56)*
Impaired-impaired	38	13	196.41	66.19	4.83 (2.29, 10.15)**	5.26 (2.45, 11.32)***	3.79 (1.64, 8.73)**

*: p < 0.05; **: p < 0.01; ***: p < 0.001
Incidence rate (number of incident cases) / (1000 person-years), HR Hazard ratio, CI Confidence interval
^aMultivariate adjustment for age, sex, education, marital status, BMI, smoking, alcohol drinking, physical activity and exercising program
^bMultivariate adjustment for age, sex, education, marital status, BMI, smoking, alcohol drinking, physical activity, exercising program, hypertension, diabetes mellitus, heart disease, hyperlipidemia, gout, hyperuricemia, arthritis, osteoporosis, stroke, cataract, cancer, fall history, sleep disturbance and frailty

ISSN: 1471-244X