Table 5.

Sensitivity analysis comparing WOMAC pain and function by Immigrant proportion subgroups after matching

	WOMAC pain Estimate ± SE	p-value	WOMAC function Estimate ± SE	p-value
Pre-operative, univariate
Immigrant proportion
< 10%	reference	–	reference	–
10% – <  40%	−1.34 ± 1.47	0.360	−2.42 ± 1.41	0.087
≥ 40%	−4.21 ± 1.47	0.004	−5.98 ± 1.42	< 0.001
Pre-operative, multivariablea
Immigrant proportion
< 10%	reference	–	reference	–
10% – <  40%	−0.66 ± 1.50	0.659	− 1.67 ± 1.44	0.244
≥ 40%	−1.47 ± 1.76	0.403	− 2.76 ± 1.67	0.098
2-year post-operative, univariate
Immigrant proportion
< 10%	reference	–	reference	–
10% – <  40%	0.03 ± 1.26	0.978	−1.05 ± 1.33	0.429
≥ 40%	−1.97 ± 1.26	0.119	− 2.25 ± 1.34	0.094
2-year post-operative, multivariablea
Immigrant proportion
< 10%	reference	–	Reference	–
10% – <  40%	0.37 ± 1.29	0.772	− 0.60 ± 1.37	0.659
≥ 40%	−1.58 ± 1.52	0.298	− 1.13 ± 1.60	0.482

SE standard error, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index

Patients were matched on age, sex, BMI and comorbidities (none v. ≥ 1)

^aMultivariable models adjusted for education level, live alone and census tract percent poverty