Table V.

Comparison of medians above and below 65 years of age (GIRFT).

Timepoint	n		Median Oxford Score (IQR)		p-value*
	≤ 65 yrs	> 65 yrs	≤ 65 yrs	> 65 yrs
Preop	430	574	14 (10 to 19)	14 (9 to 19)	0.781
6 wks	401	540	34 (27 to 40)	36 (30 to 42)	0.005
4.5 mths	356	483	40 (31 to 46)	41 (33 to 46)	0.613
1 yr	320	425	42 (32 to 47)	43 (36 to 47)	0.872
	< 70 yrs	≥ 70 yrs	< 70 yrs	≥ 70 yrs
Preop	597	407	14 (10 to 19)	14 (9 to 19)	0.810
6 wks	559	382	34 (27 to 40)	36 (30 to 42)	0.003
4.5 mths	501	338	40 (31 to 46)	41 (33 to 46)	0.912
1 yr	456	289	43 (32 to 47)	43 (33 to 47)	0.877

^*Kruskal-Wallis test.

IQR, interquartile range.