Table 2.
Prevalence and standard metrics of sleep disordered breathing among linemen and non-linemen
| Characteristic | Subjects |
P Valuea | ||
|---|---|---|---|---|
| All (n = 137) | Linemen (n = 46) | Non-linemen (n = 91) | ||
| SDB status, number (%)b | 0.63 | |||
| None | 111 (81) | 36 (78.3) | 75 (82.4) | |
| Mild | 20 (14.6) | 9 (19.6) | 11 (12.1) | |
| Moderate | 3 (2.2) | 0 | 3 (3.3) | |
| Severe | 3 (2.2) | 1 (2.2) | 2 (2.2) | |
| RDI | 0.75 | |||
| Median (25th percentile, 75th percentile) | 2 (1,4) | 2 (1,4) | 2 (1,4) | |
| Mean ± SD | 4.7 ± 12 | 5.4 ± 15 | 4.4 ± 11 | |
| Total Apneas, no. | 0.41 | |||
| Median (25th percentile, 75th percentile) | 1 (0,3) | 1 (0,3) | 2 (0,3) | |
| Mean ± SD | 6.7 ± 34 | 7.6 ± 36 | 6.3 ± 34 | |
| Total Hypopneas, no. | 0.72 | |||
| Median (25th percentile, 75th percentile) | 9 (4,14) | 9 (4,14) | 7 (4,14) | |
| Mean ± SD | 13 ± 17 | 15 ± 18 | 13 ± 17 | |
RDI refers to respiratory disturbance index.
a
Test for significant difference between linemen and non-linemen was a Mantel-Haenszel χ test of linear-by-linear association.
b
Sleep disordered breathing (SDB) status was determined based on respiratory disturbance index (RDI): none, RDI < 5; mild, RDI 5-14; moderate, RDI 15-29; severe, RDI > 29.