Which disease-related factors influence patients’ and physicians’ willingness to consider joint replacement in hip and knee OA? Results of a questionnaire survey linked to claims data

Table 4 Results of logistic regression models – factors associated with patients’ willingness to undergo TJR

Variable	Reference	OR hip	95% CI hip	p-Value hip	OR knee	95% CI knee	p-Value knee
Age, years	per 10-year increment	0.9	(0.67; 1.19)	0.45	1.09	(0.9; 1.31)	0.38
Sex, female	Male	0.99	(0.53; 1.86)	0.98	0.77	(0.5; 1.18)	0.22
BMI > =35 kg/m^2a	< 35 kg/m²	0.44	(0.15; 1.36)	0.15	1	(0.53; 1.91)	1
Symptom duration, years^b	per 5-year increment	1.01	(0.86; 1.19)	0.9	1.07	(0.99; 1.16)	0.09
Deterioration of symptoms over the 2 preceding years^a	no change/ improvement	2.73	(1.14; 6.55)	0.02	3.66	(2.05; 6.53)	< 0.01
WOMAC^a	per 10-unit increase	1.47	(1.24; 1.75)	< 0.01	1.42	(1.26; 1.61)	< 0.01
Any impact on personal life^a	No impact	10.3^c	(1.04; 103)	0.05	6.81	(2.23; 20.79)	< 0.01
WHO-5^a	per 10 units increase	0.98	(0.86; 1.11)	0.72	0.86	(0.79; 0.95)	< 0.01
Treatment by orthopaedist ^a	Treatment by other physician	2.39	(1.04; 5.48)	0.04	1.44	(0.84; 2.46)	0.18
NSAID prescription^a	No	0.97	(0.53; 1.77)	0.91	1.27	(0.78; 2.07)	0.34
Opioid prescription^a	No	0.9	(0.32; 2.54)	0.85	1.83	(1.01; 3.34)	0.05
Physical therapy prescription^a	No	1.24	(0.65; 2.39)	0.51	1.19	(0.72; 1.95)	0.49
Having at least one artificial joint	No	6.01	(3; 12.06)	< 0.01	3.69	(2.2; 6.18)	< 0.01

^aadjusted for age, sex, symptom duration
^badjusted for age, sex
^cThis result is not robust (see confidence interval) since there are only few patients willing for TJR without impact on their personal life
Results of 11 multiple logistic regression models with “patients’ willingness to undergo TJR” as independent variable. Bold numbers indicate statistically significant associations
Multiple imputation (n = 20 imputations) was used to deal with missing values

ISSN: 1471-2474