Table 2.

Comparison Analysis of Pre- and Postoperative Data between Onlay and Inlay Groups.

	Onlay Group (OG, n = 23 Patients)			Inlay Group (IG, n = 24 Patients)			p-Value
	N (%)			N (%)
	Mean ± SD	Median	(Range)	Mean ± SD	Median	(Range)
Male sex	9 (39.1%)			9 (37.5%)			1.000
Age at index operation (yrs)	74.6 ± 7.6	77.0	(59.0–87.0)	75.0 ± 5.4	75.0	(65.0–87.0)	0.848
Follow-up (months)	27.3 ± 2.9	28.0	(24.0–31.0)	52.0 ± 14.6	48.5	(24.0–89.0)	<0.001
Anterior forward flexion
preoperative	92.4 ± 40.3	90.0	(15.0–160.0)	87.9 ± 43.9	80.0	(10.0–165.0)	0.416
postoperative	128.9 ± 26.8	140.0	(70.0–160.0)	140.4 ± 33.1	150.0	(35.0–180.0)	0.032
improvement	36.5 ± 41.8	30.0	(−20.0–145.0)	52.5 ± 41.1	65.0	(−15.0–120.0)	0.112
p-value *	<0.001			<0.001
Internal rotation (°)
preoperative	4.2 ± 3.3	4.0	(1.0–12.5)	5.1 ± 4.3	4.0	(1.0–13.0)	0.728
postoperative	4.7 ± 2.8	4.0	(1.0–8.0)	3.5 ± 2.7	4.0	(1.0–13.0)	0.109
improvement	0.4 ± 3.7	0.0	(−4.5–7.0)	−1.6 ± 5.1	0.0	(−11.0–6.0)	0.341
p-value *	0.726			0.247
External rotation (°)
preoperative	4.6 ± 8.9	0.0	(0.0–30.0)	0.8 ± 4.1	0.0	(−10.0–10.0)	0.133
postoperative	12.0 ± 15.8	0.0	(0.0–45.0)	1.9 ± 3.8	0.0	(0.0–10.0)	0.028
improvement	7.4 ± 16.2	0.0	(−30.0–40.0)	1.0 ± 5.1	0.0	(−10.0–10.0)	0.191
p-value *	0.049			0.416
Constant score
preoperative	33.4 ± 15.5	28.0	(13.0–69.0)	33.3 ± 14.6	32.5	(5.0–65.0)	0.790
postoperative	67.5 ± 14.3	71.0	(35.0–93.0)	67.7 ± 14.1	72.0	(31.0–87.0)	0.898
improvement	34.1 ± 20.4	34.0	(−20.0–80.0)	34.4 ± 19.2	34.5	(3.0–76.0)	0.882
p-value *	<0.001			<0.001

* Between pre- and post-operative measurements. Underlined p-values indicate those below 0.05. °—degrees.