Table 1

Details of groups from which femoral heads were removed. Significance values for sex and age matching are from χ2 and non-parametric ANOVA tests respectively enabling acceptance of the null hypothesis of no difference between groups

Group Number of
femoral heads
(median(youngest, oldest))
Osteoporotic1713/477 (66, 91)
Osteoarthritic1612/473 (49, 86)
Normal75/279 (58, 93)
p = 0.97p = 0.44