TABLE 2.
BASELINE VALUES FOR PHYSIOLOGIC VARIABLES BY SLEEP-DISORDERED BREATHING CATEGORY*
| Apnea–Hypopnea Index Category |
|||||||
|---|---|---|---|---|---|---|---|
| Total (n = 373) | <1 (n = 112) | 1–4.9 (n = 100) | 5–14.9 (n = 94) | 15–29.9 (n = 25) | ≥30 (n = 13) | CPAP Users (n = 29) | |
| PETCO2, mm Hg | 40 (4) | 40 (4) | 40 (3) | 40 (3) | 40 (3) | 40 (7) | 39 (3) |
| Ventilation, L/min | 8.3 (2.1) | 7.7 (1.9) | 7.8 (1.6) | 8.7 (2) | 8.4 (2) | 10.6 (3.2) | 9.8 (2.5) |
| Heart rate, beats/min | 68 (11) | 68 (11) | 68 (11) | 67 (10) | 72 (9) | 74 (12) | 69 (13) |
| Systolic pressure, mm Hg | 122 (14) | 119 (14) | 122 (13) | 125 (14) | 127 (10) | 125 (11) | 127 (15) |
| Diastolic pressure, mm Hg | 78 (9) | 76 (9) | 78 (7) | 78 (10) | 80 (11) | 80 (8) | 78 (8) |
Definition of abbreviations: CPAP = continuous positive airway pressure; PETCO2, end-tidal CO2 tension.
*
Values shown are means (SD).