Table 4 Cox regression analysis results of the factors associated with care needs increases

	Model 1		Model 2		Model 3		Model 4		Model 5
Characteristic	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI
Dementia(Ref: Non-Dementia)	1.46**	1.44–1.49	1.45**	1.42–1.48	1.55**	1.52–1.58	1.55**	1.52–1.58	1.53**	1.49–1.56
Age (Ref: 65-74 y)
75-84 y			1.16**	1.13–1.20	1.06**	1.52–1.58	1.07**	1.04–1.10	1.07**	1.04–1.10
85-94 y			1.24**	1.21–1.28	1.20**	1.16–1.23	1.19**	1.15–1.22	1.19**	1.15–1.22
≥95 y			1.26**	1.17–1.36	1.37**	1.27–1.47	1.35**	1.25–1.45	1.35**	1.25–1.45
Female (Ref: Male)			1.07**	1.05–1.09	1.05**	1.03–1.07	1.06**	1.04–1.08	1.06**	1.04–1.08
Care needs (Ref: Care Needs Level 4)
Support Required Level 1					12.65**	11.89–13.45	13.25**	12.46–14.10	13.26**	12.46–14.10
Support Required Level 2					12.27**	11.70–12.86	12.85**	12.25–13.49	12.87**	12.27–13.50
Care Needs Level 1					2.21**	2.14–2.29	2.30**	2.23–2.39	2.31**	2.23–2.38
Care Needs Level 2					1.54**	1.49–1.59	1.58**	1.53–1.63	1.59**	1.53–1.63
Care Needs Level 3					1.36**	1.31–1.41	1.37**	1.33–1.42	1.37**	1.33–1.42
Living Alone							0.84**	0.81–0.86	0.81**	0.78–0.83
Living Alone*Dementia									1.09*	1.04–1.15

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