Document Classification

Section Type: RESULTS

Text: Three months after undergoing randomization, the CPAP group, as compared with the control group, had greater reductions in the frequency of episodes of apnea and hypopnea (-21 + / -16 vs. -2 + / -18 per hour, P < 0. 001) and in norepinephrine levels (-1. 03 + / -1. 84 vs. 0. 02 + / -0. 99 nmol per liter, P = 0. 009), and greater increases in the mean nocturnal oxygen saturation (1. 6 + / -2. 8 percent vs. 0. 4 + / -2. 5 percent, P < 0. 001), ejection fraction (2. 2 + / -5. 4 percent vs. 0. 4 + / -5. 3 percent, P = 0. 02), and the distance walked in six minutes (20. 0 + / -55 vs. -0. 8 + / -64. 8 m, P = 0. 016).