The two-year incidence of hip osteoarthritis after arthroscopic hip surgery for femoroacetabular impingement syndrome

Table 3 Adjusted Odds Ratios for Variables in Model Predicting Hip Osteoarthritis Diagnosis 24 months After Surgery

	Odds Ratio	95% CI	P-Value
Step 1: Variables present at baseline Hosmer & Lemeshow p = 0.445; Cox R² = 0.018; Nagelkerke R² = 0.028
V1: Age	1.037	1.023 to 1.052	< .001*
V2: Military Status (Active Duty)	1.117	0.881 to 1.416	0.361
V3: Sex (male)	1.305	1.035 to 1.645	0.025*
Step 2: Variables present after surgery Hosmer & Lemeshow p = 0.826; Cox R² = 0.033; Nagelkerke R² = 0.051
V4: Surgical Complications	1.136	0.613 to 2.104	0.686
V5: Underwent an Additional Hip Surgery	2.330	1.718 to 3.159	< .001*

There was a significant effect when adding Step 2 variables to the model after Step 1 (χ²(2) = 28.48, p < .001). The parameter estimates are from the 2nd step of variable entry (all 5 variables). V Variable, CI Confidence Interval; *P < 0.05

ISSN: 1471-2474