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Table 3 Comparison of the head-to-head ratio and head-to-acetabulum ratio between two groups

From: The diagnostic value of SPECT/CT in predicting the occurrence of osteonecrosis following femoral neck fracture: a prospective cohort study

  ONFH (n = 6) Non-ONFH (n = 24) p-value
Uptake of femoral head
 Affected hip 66.3 (53.7–79.0) 247.6 (134.9–360.3) 0.044
 Unaffected hip 201.3 (172.3–230.3) 206.6130.9–282.3) 0.631
Uptake of acetabulum
 Affected hip 319.1 (219.6–418.6) 285.7(182.9–388.7) 0.561
 Unaffected hip 337.2 (217.2–457.2) 290.2 (194.1–386.4) 0.527
Head-to-head ratio 0.33 (0.28–0.38) 1.30 (1.03–1.57) < 0.001
Head-to-acetabulum ratio 0.22 (0.18–0.26) 0.93 (0.72–1.14) < 0.001
  1. ONFH osteonecrosis of the femur head