Table 1

Age and sex distribution of different grade of medial compartment OA stratified by type of surgery
AMR AMR + PLR Total
Stage Age (SD)/No. F/M (Ratio) Age (SD)/No. F/M (Ratio) Age (SD)/No. F/M (Ratio)
I 52 (9)/37 30/7 (4.3) 55 (10)/12 11/1 (11)* 53 (9)/49 41/8 (5.1)
II 58 (11)/163 123/40 (3.1) 59 (11)/47 43/4 (10.8)* 58 (11)/210 166/44 (3.8)
III 64 (8)/170 147/23 (6.4) 63 (5)/37 32/5 (6.4) 64 (7)/207 179/28 (4.6)
IV 62 (7)/36 30/6 (5.0) 66 (1)/3 3/0 (NA)* 62 (7)/39 33/6 (5.5)
Total 60 (9)/406 330/76 (4.3) 64 (11)/99 89/10 (8.9)* 60 (10)/505 419/86 (4.9)
p<0.0001, R2=0.15 p=0.019, R2=0.07 p<0.0001, R2=0.13

* Statistically significant compared to that of the AMR group by comparisons for each pair using paired t test (p<0.05).

Lyu et al.

Lyu et al. BMC Musculoskeletal Disorders 2012 13:226   doi:10.1186/1471-2474-13-226

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