Table 2.
Glucose tolerance testing and PSG results
| Characteristic | Mean ± SD (range) |
|---|---|
| Insulin and glucose measures | |
| Fasting plasma glucose (mg/dL) | 92 ± 10 (74–130) |
| Fasting plasma insulin (μIU/mL) | 26.7 ± 16.1 (6.6–66) |
| 2-h plasma glucose (mg/dL) | 130 ± 31 (90–237) |
| 2-h plasma insulin (μIU/mL) | 194.4 ± 250.6 (6.5–1,541.5) |
| HbA1c (%) | 5.4 ± 0.4 (4.6–6.4) |
| HOMA-IR | 6.1 ± 4.0 (1.4–17.6) |
| IGI | 3.89 ± 3.08 (0.38–12.32) |
| AIRg | 1,787.48 ± 1,635.72 (30.33–7,433.40) |
| WBISI | 2.54 ± 1.57 (0.42–7.37) |
| SI | 2.01 ± 1.39 (0.031–6.29) |
| Sleep architecture and OSA measures | |
| Sleep latency (minutes) | 20.9 ± 18.7 (0.5–91.0) |
| TST (minutes) | 424.6 ± 57.8 (291.5–552) |
| %TST in N1 (%) | 9.2 ± 5.7 (1.5–32.4) |
| %TST in N2 (%) | 49.2 ± 7.2 (31.2–62.5) |
| %TST in N3 (%) | 21.2 ± 4.9 (10.4–32.5) |
| %TST in REM (%) | 20.3 ± 5.2 (8.4–31.3) |
| AHI | 4.7 ± 10.7 (0.0–68.5) |
| Distribution | |
| AHI <5 | N = 49 |
| AHI 5–10 | N = 7 |
| AHI >10 | N = 6 |
| Arousal index (%) | 14.8 ± 9.7 (6.8–72.4) |
| Lowest SaO2 (%) | 92 ± 4 (82–100) |
Sleep architecture (durations are given in minutes; percentages are denoted as %). %TST in N = percentage of total sleep time spent in a given sleep stage (e.g., %TST in N1=% total sleep time in N1).