Table 3.

Comparison of the functional assessment results obtained in the studied groups between the individual follow-up points.

Within-Group and Between-Group Comparison of Quick DASH Score [n of Points]
	Group I	Group II	p
T0	60.80 ± 9.63	61.93 ± 7.38	ns
T1	9.00 ± 8.03	51.55 ± 10.50	≤0.001
p	≤0.001	≤0.001
T2	4.00 ± 3.81	25.00 ± 7.77	≤0.001
p	≤0.001	≤0.001
T3	1.17 ± 2.52	4.22 ± 4.87	0.004
p	ns	≤0.001

Values expressed as arithmetic mean and standard deviation, ±. Group I, patients treated for a frozen shoulder by early arthroscopic capsular release, corticosteroid injection, and subsequent postoperative physiotherapy; Group II, patients treated for a frozen shoulder by corticosteroid injection and physiotherapy; ns, not statistically significant; p, level of significance; T0, just before the given treatment; T1, three months after T0; T2, six months after T0; T3, 12 months after T0.