Table 2.

Group differences between patients with and without ischiofemoral impingement as well as greater trochanteric pain syndrome. Preoperative CT imaging to assess femoral anteversion change was available for all symptomatic patients

			p value	Odds ratio (95% CI)
	IFI (n = 8)	No IFI (n  = 189)
Age (years)	58.5 ± 11.5	62.6 ± 12.5	0.366
Female sex	7 (87.5)	88 (46.6)	0.023*	8.034 (0.969–66.579)
Body mass index	28.3 ± 7.0	28.3 ± 5.8	0.994
Time from surgery to CT imaging (days)	401 ± 635	421 ± 648	0.202
Femoral anteversion (°)	25.2 (5.9)	14.4 (10.2)	0.006*
Femoral anteversion change (°)	5.4 (3.2)	1.4 (3.1)	< 0.001*
Offset change (mm)	+1.4 ([−2.8] – [+3.4])	+0.3 ([−0.4] – [+0.8])	0.419
	GTPS (n = 14)	No GTPS (n = 183)
Age (years)	64.3 ± 9.0	62.3 ± 12.7	0.562	1.471 (0.491–4.409)
Female sex	8 (57.1)	96 (52.5)	0.488
Body mass index	25.8 ± 9.2	28.5 ± 5.5	0.105
Time from surgery to CT imaging (days)	430 ± 639	398 ± 651	0.095
Femoral anteversion (°)	13.5 (7.5)	15.3 (10.2)	0.549
Femoral anteversion change (°)	3.0 (3.2)	2.4 (2.7)	0.751
Offset change (mm)	+2.7 ([−0.8] – [+4.1])	+1.2 ([−1.1] – [+3.1])	0.059

^*Statistical significance

Ordinal data is given as frequency with percentage in parentheses. Continuous data are presented as mean ± standard deviation as well as median with range or interquartile range in parentheses. IFI, ischiofemoral impingement; GTPS, greater trochanteric pain syndrome