Table 1

 Details of groups from which bone was removed

GroupNo. of patientsSex(M/F)Median age(oldest, youngest)
Analysis of sex matching was performed using a χ2 test. Age distributions were analysed using one way analysis of variance followed by Tukey’s test for pairwise comparisons, when normally distributed, or Kruskal-Wallis one way analysis of variance on ranks if data failed the Kolmogorov-Smirnov test for normality with p<0.05 (p>0.05 indicates no significant differences between groups). *†Pairs of variables that are significantly different (p<0.05).
Measurement of crystallite size
    Osteoarthritic2712/1573 (90, 50)*
    Osteoporotic164/1286 (92, 66)*
    Control40/477 (93, 64)
p = 0.14*p<0.05
Unit cell dimensions
    Osteoarthritic100/1073.5 (81, 60)
    Osteoporotic105/573.5 (87, 66)
    Control62/471.5 (93, 56)
p = 0.04p = 0.92
    Osteoarthritic208/1273 (90, 50)*
    Osteoporotic183/1585 (92, 66)*†
    Control73/4 p = 0.2369 (93, 37)† p<0.05