Document Classification

Section Type: RESULTS

Text: Allopurinol had no significant effect on heart rate variability compared with placebo ; the results are expressed as a difference in means + / - s. d. with 95 % confidence interval (CI) between allopurinol and placebo : SDNN mean = 6. 5 + / - 4. 8 ms, P = 0. 18 and 95 % CI (-3. 7, 17) ; TI mean = -2. 1 + / - 1. 4, P = 0. 16 and 95 % CI (-5. 2, 0. 8) ; SDANN mean = -2. 8 + / - 7 ms, P = 0. 68 and 95 % CI (-18, 12) ; SDNNi mean = 2 + / - 6. 6, P = 0. 7 and 95 % CI (-12, 16) ; RMSSD mean = -0. 9 + / - 2, P = 0. 68 and 95 % CI (-5. 6, 3. 7).