Document Classification

Section Type: RESULTS

Text: Patients in ketamine group had significantly lower scores of postoperative pain (5. 2 + / - 1. 2, 4. 9 + / - 1. 6, 4. 4 + / - 2. 2, 4. 3 + / - 1. 5, and 3. 4 + / - 1. 3 at 2, 4, 8, 16, and 24 h postoperatively vs. 7. 7 + / - 1. 5, 7. 3 + / - 1. 6, 6. 3 + / - 1. 9, 6. 0 + / - 1. 6, and 5. 1 + / - 1. 8 in placebo group ; P < 0. 05).