Document Classification

Section Type: RESULTS

Text: The scores of visual analogue scale (VAS) and present pain intensity (PPI) after treatment were all improved significantly as compared with those before treatment in the 4 groups (all P < 0. 01), and the result in the 45 min group was superior to the other 3 groups (VAS : 2. 90 + / -0. 87 vs 5. 52 + / -1. 01, 4. 45 + / -0. 81, 5. 95 + / -1. 07 ; PPI : 1. 40 + / -0. 21 vs 2. 26 + / -0. 54, 2. 21 + / -0. 43, 2. 28 + / -0. 74, all P < 0. 01).