Table 1.
Subject Characteristics
| Comparison with Gold-Standard Resistance |
|||
|---|---|---|---|
| Development (n = 6) | Test Set 1 (n = 23) | Test Set 2 (n = 39) | |
| Demographics | |||
| Age, yr | 56 ± 19 | 50 ± 17 | 51 ± 16 |
| Sex, M/F | 5/1 | 21/2 | 31/8 |
| BMI, kg/m2 | 35.9 ± 10.5 | 34.3 ± 8.7 | 28.7 ± 5.0 |
| Sleep-disordered breathing | |||
| OAI, h−1 | 10.6 ± 9.8 | 7.8 (23.4) | 3.0 ± 8.0 |
| CAI, h−1 | 0.8 (11) | 0.6 (3.1) | 0.5 ± 1.6 |
| AHI3A, h−1 | 68.2 ± 34.4 | 55.2 ± 26.4 | 13.2 ± 12.0 |
| Breath size distribution* | |||
| Imputed breaths | 5,161 (14.6%) | 15,689 (11.5%) | 5,573 (0.1%) |
| Small breaths | 8,932 (25.2%) | 40,317 (29.5%) | 59,636 (21.5%) |
| Normal breaths | 21,305 (60.2%) | 80,907 (59.0%) | 211,594 (76.4%) |
| Total number of breaths | 35,398 | 136,913 | 276,803 |
Definition of abbreviations: AHI3A = apnea–hypopnea index (hypopnea associated with 3% desaturation and/or arousal); BMI = body mass index; CAI = central apnea index; imputed breaths = artificial breaths during apneas; normal breaths = breaths with an amplitude of greater than 85% of normalized breath amplitude (all breaths during sleep/wake are included except for breaths during invalid periods of the study [e.g., equipment disconnects]); OAI = obstructive apnea index; small breaths = breaths with an amplitude of less than 85% of normalized breath amplitude.
Values are presented as mean ± SD. In cases of non-normally distributed data, values are represented as median (interquartile range). Test set 1: New York, NY. Test set 2: Solingen, Germany.
For the breath size distribution, values in parentheses represent percent of total number of breaths.