Table 2

Mean differences of outcome measures from baseline to 2-year follow-up within and between operative and non-operative groups

	Operative (n=55)						Non-operative (n=68)
	n	Baseline mean	2-year mean	Mean difference	95% CI	Within group p value*	n	Baseline mean	2-year mean	Mean difference	95% CIs	Within group p value*	Between group p value†
Pain VAS‡	36	47.43	8.92	−38.51	−29.89 to −47.14	<0.0010	48	42.74	33.48	−9.26	0.61 to −19.13	0.0652	<0.0001
PCS‡	29	41.31	50.06	8.75	11.56 to 5.94	<0.0001	41	40.00	43.52	3.53	6.59 to 0.47	0.0248	0.0002
MCS§	29	51.02	54.51	3.49	7.77 to −0.79	0.0511	41	51.06	53.24	2.18	4.74 to −0.39	0.0879	0.8108
ASES‡	32	54.72	90.25	35.53	43.43 to 27.63	<0.0001	41	61.7317	72.37	10.63	16.86 to 4.41	0.0013	<0.0001
WORC‡	37	1112.16	285.95	−826.20	−678.00 to −974.40	<0.0001	46	1006.52	711.22	−295.30	−121.80 to −468.80	0.0013	<0.0001
SAT§	34	79.68	89.50	9.82	19.35 to 0.29	0.0034	38	72.61	80.55	7.95	16.32 to −0.43	0.0205	0.0981
SANE§	36	29.81	82.89	53.08	63.05 to 43.11	<0.0001	48	36.03	57.92	21.89	30.89 to 12.88	<0.0001	<0.0001

*p values for mean difference from baseline to 2-year mean.
†p values for difference between 2-year operative mean and 2-year non-operative mean.
‡p values calculated using t-tests.
§p values calculated using Wilcoxon signed-rank tests.
ASES, American Shoulder and Elbow Surgeons; MCS, mental component summary; PCS, physical component summary; SANE, Single Assessment Numeric Evaluation; SAT, Scapular Assistance Test; VAS, Visual Analogue Scale; WORC, Western Ontario Rotator Cuff Index.