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| Factor | Before trial | After trial | T | P |
| Severity scale (factor1) | 3.72±1.45 | 3.80±1.03 | 0.151 | 0.702 |
| Environment-specific scale(factor2) | 4.21±1.05 | 4.33±1.15 | 0.239 | 0.630 |
| Outcome scale (factor 3) | 4.74±1.28 | 4.16±1.45 | 1.781 | 0.197 |
| Rest, sleep-responding scale(factor 4) | 5.05±2.00 | 5.48±1.76 | 0.679 | 0.420 |
