Table 4.
Percentage of patients with AHI > 10 by subgroups
| Dimension | Group | # Studies | % AHI > 10 (95% CI) | p-value |
|---|---|---|---|---|
| Overall | All Studies | 23 | 62 (57–67) | |
| Event type | Ischemic Stroke | 3 | 61 (42–78) | 0.489 |
| TIA | 3 | 52 (30–73) | ||
| Hemorrhagic Stroke | 4 | 71 (50–85) | ||
| Prior event | First | 9 | 57 (49–64) | 0.013 |
| Recurrent | 3 | 74( 63–82) | ||
| Sex | Female | 12 | 48 (40–56) | 0.001 |
| Male | 12 | 65 (59–71) | ||
| Patient location | Cohort | 1 | 45 (34–56) | 0.009 |
| Rehab Unit | 4 | 57 (45–68) | ||
| Inpatient Unit | 18 | 64 (58–69) | ||
| Timing of study after CVA | < 7 days | 13 | 60 (55–65) | 0.128 |
| 7-28 days | 7 | 72 (60–81) | ||
| > 28 days | 3 | 53(37–69) | ||
| Stroke etiology | Cardioembolic | 3 | 48 (41–56) | 0.005 |
| Macrovascular | 3 | 71 (49–86) | ||
| Microvascular | 3 | 61 (46–74) | ||
| Other | 3 | 66 (31–90) | ||
| Unknown | 3 | 82 (66–91) | ||
| Study type | Full PSG (with EEG) | 8 | 63 (54–71) | 0.226 |
| Limited (without EEG) | 11 | 58 (51–64) | ||
| AutoCPAP | 4 | 75 (54–88) | ||
| Testing method | Pressure Transducer | 8 | 58 (50–66) | 0.319 |
| Thermistor | 10 | 59 (53–66) | ||
| Auto-CPAP | 4 | 75 (54–88) | ||
| Hypopnea criteria | Arousal or desat with reduced flow | 5 | 58 (48–68) | 0.860 |
| Desaturation with reduced flow | 5 | 63 (51–75) | ||
| Effort reduction | 4 | 63 (50–74) | ||
| Flow reduction alone | 6 | 67 (52–79) | ||
| Flow-50 | 2 | 60 (49–70) | ||
CI, confidence interval. The p-values indicate whether any of the subgroups had a statistical effect on the percentage of patients with AHI > 10 determined with a random effects model.Hypopnea criteria: Flow-50, flow reduction at least 50% or flow reduction at least 30% with desaturation or arousal (if full PSG).