Table 3.

Poisson regressions on variables associated with the number of items that needed to be modified

Exposure variables	IRR (95% CI)
Age	1.01(1.00-1.01) ***
Personal Income	0.99(0.99–0.99) **
Education:
None or less than primary (ref)	-
Primary	1.11(1.09–1.19) **
Middle school and higher	1.03(0.96–1.12)
Building with an elevator
No (ref)	-
Yes	1.14(1.07–1.21) ***
Self-rated health condition
Poor (ref)	-
Good	0.78(0.73–0.84) ***
Chronic disease
No (ref)	-
Yes	1.16(1.09–1.25) ***
Level of assistance
Independent (ref)	-
Low-level physically dependent	2.31(2.09–2.56) ***
Mid-level physically dependent	2.20(1.89–2.56) ***
Fully dependent	1.99(1.61–2.47) ***

IRR Incidence rate ratio, CI Confidence interval

^**P < 0.01

^***P < 0.001