Table 3.

Cross tabulation of preoperative flexion quartiles to flexion outcome group

Preoperative flexion quartiles	Loss in flexion (< −5)	No change in flexion	Gain in flexion (> 5)
0–25th percentile(< 100°)	2.2%	11.1%	89.7%
25th–50th percentile (100°–110°)	4.3%	21.9%	73.8%
50th–75th percentile (110°–120°)	11.7%	38.4%	49.9%
75th percentile (≥ 120°)	76.5%	55.7%	12.8%

Crosstabulation with Pearson chi square was highly significant (p < 0.0001) , suggesting as preoperative flexion quartile increases, there is a significant decrease in the percentage of those that gain flexion postoperatively.