Table 3.

Studies evaluating groups of patients and reporting the number of hips belonging to the six categories according to Beaton & Anson (28). Results are presented as percentages.

Study	Hips, n	Type I	Type II	Type III	Type IV	Type V	Type VI	Other variations
Beaton & Anson (28)	240	84.20	11.7	3.3	0.8	-	-	-
Natsis et al. (29)	294	93.60	4.1	0.30	0.30	-	0.30	1.40
Pecina (32)	130	78.46	20.77	0.77	-	-	-	-
Pokorny et al. (33)	182	79.10	-	-	14.30	2.20	4.40	-
Benzon et al. (34)	66	98.50	1.50	-	-	-	-	-
Varenika et al. (35)	643	86.80	12.90	-	-	-	-	-
Smoll et al. (36)	6,062	83.1	13.7	1.29	0.53	0.08	0.0	-
Poutoglidou et al. (30)	1,612	83–90	5–10	0–3	0–2	-	-	-