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Table 2 Univariate odds ratios of different characteristics for the necrotic femoral head

From: Insufficient blood supply of fovea capitis femoris, a risk factor of femoral head osteonecrosis

Characteristic

Univariate OR (95% CI)

P value

Number of nutrient foramina

0.51 (0.40–0.66)

< 0.001

Area

 Total area of nutrient foramina, mm2

0.58 (0.44–0.77)

< 0.001

 Mean area of nutrient foramina, mm2

0.52 (0.30–0.92)

0.023

Diameter

 Maximum diameter of the nutrient foramen, mm

0.26 (0.15–0.45)

< 0.001

 Minimum diameter of the nutrient foramen, mm

0.20 (0.10–0.42)

< 0.001

  1. Significant values are shown in bold
  2. Abbreviations: OR, odds ratio