Table 2

Glucose tolerance testing and PSG results

CharacteristicMean ± 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-IR6.1 ± 4.0 (1.4–17.6)
 IGI3.89 ± 3.08 (0.38–12.32)
 AIRg1,787.48 ± 1,635.72 (30.33–7,433.40)
 WBISI2.54 ± 1.57 (0.42–7.37)
 SI2.01 ± 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)
AHI4.7 ± 10.7 (0.0–68.5)
Distribution
 AHI <5N = 49
 AHI 5–10N = 7
 AHI >10N = 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).