Document Classification

Section Type: RESULTS

Text: The median (quartiles) apnea-hypopnea index at 490 m was 4. 6 / h (2. 3 ; 7. 9), values at 1, 630 and 2, 590 m, day 1 and 2, respectively, were 7. 0 / h (4. 1 ; 12. 6), 5. 4 / h (3. 5 ; 10. 5), 13. 1 / h (6. 7 ; 32. 1), and 8. 0 / h (4. 4 ; 23. 1) ; corresponding values of mean nocturnal oxygen saturation were 96 % (95 ; 96), 94 % (93 ; 95), 94 % (93 ; 95), 90 % (89 ; 91), 91 % (90 ; 92), P < 0. 05 versus 490 m, all instances.