Association between body mass index, multi-morbidity and activities of daily living among New Zealand nursing home older adults: a retrospective analysis of nationwide InterRAI data

Table 5 Prevalence ratios (95% CI) for the association between body mass index and disability in ADL

Body mass index	N	Crude		Model 1		Model 2
Body mass index	N	PR (95% CI)	p-value	PR (95% CI)	p-value	PR (95% CI)	p-value
Underweight	21,109	1.83 (1.75, 1.91)	< 0.001	1.80 (1.72, 1.89)	< 0.001	1.81 (1.73, 1.90)	< 0.001
Normal (ref)	83,285	1.00		1.00		1.00
Overweight	58,543	0.58 (0.55, 0.61)	< 0.001	0.56 (0.53, 0.58)	< 0.001	0.55 (0.53, 0.58)	< 0.001
Obese	32,490	0.29 (0.27, 0.31)	< 0.001	0.25 (0.23, 0.27)	< 0.001	0.25 (0.23, 0.27)	< 0.001
Extremely obese	3363	0.10 (0.07, 0.15)	< 0.001	0.07 (0.05, 0.11)	< 0.001	0.07 (0.05, 0.11)	< 0.001

Model 1: Adjusted for age and gender; Model 2: Model 1 + ethnicity and DHB region
P.R. Prevalence ratio, Ref Reference, N Number of respondents

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