Table 2.

Effect of Weight Categories on Health Care Utilization Using Propensity Weighted Adjusted Logistic Regression Models: (A) Partial Model and (B) Full Model.

At least one utilization in the last 12 months	Weight category	Odds ratio	95% CI	p
(A) Partial model controlling for demographics and socioeconomics
Any inpatient admissions	Underweight	1.38	[1.220, 1.556]	<.0001
	Normal weight	1.00		n/a
	Overweight	0.97	[0.928, 1.022]	.28
	Obese	1.15	[1.079, 1.225]	<.0001
Any ER visits	Underweight	1.22	(1.084, 1.377)	.001
	Normal weight	1.00		n/a
	Overweight	0.91	[0.865, 0.949]	<.0001
	Obese	1.02	[0.961, 1.089]	.48
Any orthopedic procedure	Underweight	0.63	[0.548, 0.717]	<.0001
	Normal weight	1.00		n/a
	Overweight	1.16	[1.111, 1.214]	<.0001
	Obese	1.30	[1.230, 1.380]	<.0001
(B) Full model additionally controlling for comorbidity, health/functional status
Any inpatient admissions	Underweight	1.27	[1.124, 1.443]	<.0001
	Normal weight	1.00		n/a
	Overweight	1.01	[0.961, 1.061]	.69
	Obese	1.02	[0.954, 1.087]	.58
Any ER visits	Underweight	1.12	[0.987, 1.262]	.08
	Normal weight	1.00		n/a
	Overweight	0.93	[0.888, 0.977]	.004
	Obese	0.93	[0.871, 0.991]	.03
Any orthopedic procedure	Underweight	0.63	[0.546, 0.721]	<.0001
	Normal weight	1.00		n/a
	Overweight	1.20	[1.143, 1.252]	<.0001
	Obese	1.23	[1.153, 1.301]	<.0001

Note. Normal weight is the reference category. Model (A) controls for demographic and socioeconomic variables and Model (B) additionally includes self-reported chronic conditions, self-reported perception of physical and mental health ADLs and smoking status. A full list of variables included is given in Table 1. CI = confidence interval; n/a = not applicable; ER = emergency room; ADL = activities of daily living.