Results of the different sleep studies
| Diagnosis (July 1989) | First CPAP trial (July 1989) | UPPP (July 1992) | Protriptyline (October 1992) | Second CPAP trial (October 1992) | Follow up (January 1997) | Transtracheal air (January 1997) | |
|---|---|---|---|---|---|---|---|
| Total sleep time (TST) (h) | 6.7 | 5.3 | 3.7 | 5.4 | 7.6 | 7.0 | 7.5 |
| Stage I–II (% TST) | 71.1 | 39.1 | 71.9 | 78.2 | 48.7 | 76.0 | 51.2 |
| Stage III–IV (% TST) | 15.5 | 30.5 | 15.5 | 12.0 | 31.0 | 10.1 | 32.7 |
| Stage REM (% TST) | 13.4 | 30.4 | 12.6 | 9.8 | 20.3 | 13.9 | 16.1 |
| Apnoea + hypopnoea index (no./h) | 52.0 | 14.6 | 55.0 | 56.2 | 11.3 | 48.1 | 7.2 |
| Arousal index (no./h) | — | — | 45.0 | 55.0 | 10.0 | 54.7 | 8.6 |
| % TST <90% Sao 2 | 31.5 | 4.7 | 40.0 | 45.7 | 3.0 | 21.6 | 1.6 |
CPAP = continuous positive airway pressure; UPPP = uvulopalatopharyngoplasty.