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Table 2 Preoperative radiographic evaluations in the acetabular dysplasia (AD) only and AD + cam-type deformity groups

From: Prevalence and characteristics of cam-type femoroacetabular deformity in 100 hips with symptomatic acetabular dysplasia: a case control study

Parameters AD only (n=60) AD + cam-type deformity (n=40) pvalue
  Mean (SD; range) Mean (SD; range)  
Alpha angle (degrees) 40.2 (6.7; 26.7 to 53.0) 73.5 (14.4; 56.0 to 118.0) <0.001*
Lateral centre-edge angle (degrees) 11.3 (7.1; -10.0 to 22.8) 11.4 (6.7; -7.0 to 21.7) 0.975
Acetabular roof obliquity (degrees) 17.9 (7.3; 5.1 to 36.3) 19.1 (9.8; 5 to 31.9) 0.632
Acetabular head index (%) 65.8 (8.9; 39.8 to 83.6) 64.9 (8.7; 40.8 to 80.2) 0.586
Joint space (mm) 4.2 (1.1; 2.2 to 6.3) 4.1 (1.0; 2.5 to 6.0) 0.733
Neck-shaft angle (degrees) 133.9 (5.6; 125.2 to 146.1) 134.7 (6.5; 125.3 to 154) 0.688
Anterior centre-edge angle (degrees) 12.9 (11.8; -14.5 to 30.7) 12.5 (12.0; -14.7 to 33.7) 0.563
  1. *p <0.05 (Mann-Whitney U test) for the difference between the groups. SD standard deviation.