Table 3 .

- Comparison of QS scores in the 3 groups before and after treatment.

Groups	Cases	Before treatment	At 1 day after treatment At	3 months after treatment	At 6 months after treatment
I	24	0.8±0.7	3.1±0.7*,†	3.3±0.6*,†	3.4±0.6*,†
II	22	0.7±0.7	3.1±0.5*,†	2.9±0.6*,**,†	3.0±0.7*,**†
III	21	1.0±0.6	1.8±0.5†	1.9±0.5†	1.9±0.5†

* - p<0.05, compared with group I at the same time point; ** - p<0.05, compared with group III at the same time point. † - indicates the comparison within the same group relative to the value before treatment, p<0.0083. QS - quality of sleep