Table III.

EuroQol 5-Dimension 3-Level (EQ-5D-3L) index quartiles at inclusion (presurgery) and at the 2-year follow-up for each of 3 groups defined by the presurgery OSS (low, moderate, and high) and for each of 3 age groups (age at inclusion). Different superscript small letters (a, b, c) indicate groups within time (presurgery or 2-year follow-up) ie, in columns that are significantly different in EQ-5D-3L index as examined by the nonparametric median test. Correspondingly, different superscript capital letters (A, B) indicate significant EQ-5D-3L index differences within presurgery groups, and within age groups between presurgery and the 2-year follow-up, ie, in rows.

Pre-OSS subgroups	Presurgery	2 y FU	Age groups	Presurgery	2 y FU
Low pre-OSS	N = 23		18-49 y	N = 63
Lower quartile	0.29	0.57	Lower quartile	0.50	0.71
Median	0.38a,A	0.71a,B	Median	0.71a,A	0.78a,B
Upper quartile	0.65	0.78	Upper quartile	0.78	0.84
Mod pre-OSS	N = 48		50-59 y	N = 33
Lower quartile	0.64	0.71	Lower quartile	0.62	0.71
Median	0.71b,A	0.78ab,B	Median	0.71a,A	0.78a,B
Upper quartile	0.71	1	Upper quartile	0.71	0.82
High pre-OSS	N = 60		60+ y	N = 35
Lower quartile	0.71	0.78	Lower quartile	0.71	0.78
Median	0.78c,A	0.82b,B	Median	0.76b,A	1b,B
Upper quartile	0.78	1	Upper quartile	0.78	1

OSS, Oxford Shoulder Score; FU, follow-up.