Table 5.

Relationship between cam and incident radiographic OA progression, determined by generalised estimating equations

		Model 1		Model 2		Model 3
Exposure	Outcome	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value
Cam	Change in Osteophyte score	1.00 (0.67–1.49)	0.99	1.10 (0.79–1.65)	0.65	1.13 (0.70–1.80)	0.62
Cam	Change in JSN score	1.00 (0.87–1.15)	0.99	0.99 (0.86–1.13)	0.87	1.00 (0.85–1.18)	0.99
Cam	Incident OA	0.76 (0.16–3.49)	0.72	1.28 (0.26–6.37)	0.76	2.94 (0.61–14.27)	0.18
Cam	Increase in Croft score	1.17 (0.32–4.27)	0.81	1.33 (0.34–5.14)	0.68	2.24 (0.48–10.47)	0.31

Incident OA: Any OA at follow-up in a hip with Croft < 3 at baseline

Model 1: unadjusted; Model 2: age and sex adjusted; Model 3: adjusted for sex, age, weight and height, adolescent activity level and HBM status

Odds in hips with cam morphology compared to hips without cam morphology

Abbreviations: JSN Joint space narrowing, OA Osteoarthritis, OR Odds ratio, CI 95% confidence interval