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Table 2 Radiographic parameters of AS patients on different stages of hip involvement

From: The correlation between volumetric bone mineral density and morphological parameters of the proximal femur and clinical outcomes in ankylosing spondylitis patients with hip involvement

Parameters Total AS patients (n = 65) Group A (n = 39) Group B (n = 26) P value
CFI 3.52 ± 0.79 (1.70–5.77) 3.53 ± 0.70 (2.12–4.96) 3.50 ± 0.92 (1.70–5.77) 0.698
MCFI 2.19 ± 0.29 (1.33–3.04) 2.20 ± 0.31 (1.33–3.04) 2.19 ± 0.26 (1.76–2.66) 0.779
CCR 0.48 ± 0.11 (0.30–0.86) 0.48 ± 0.10 (0.32–0.74) 0.48 ± 0.12 (0.30–0.86) 0.883
CBR 0.46 ± 0.08 (0.31–0.65) 0.45 ± 0.07 (0.31–0.58) 0.48 ± 0.09 (0.32–0.65) 0.194
  1. Group A represents the hips with absent, minimal or mild radiographic involvement (BASRI-Hip score = 0 or 1 or 2) and Group B represents the hips with moderate to severe radiographic involvement (BASRI-Hip score = 3 or 4)
  2. Abbreviations: AS Ankylosing spondylitis, CFI Canal flare index, MCFI Metaphyseal canal flare index, CCR Canal to calcar ratio, CBR Canal bone ratio