| Metric | Value |
|---|---|
| Sleep start | 2026-09-07 22:47:24-05:00 |
| Time in bed | 399.4 min (6h 39.4m) |
| Total sleep | 386.4 min (6h 26.4m) |
| Sleep efficiency | 96.7% |
| Awake time | 13.0 min |
| Core (N1+N2) sleep | 268.4 min / 69.48% |
| Deep (N3) sleep | 31.1 min / 8.05% |
| REM | 86.8 min / 22.47% |
| CPAP usage hours | 6.48 |
| Session count | 1 |
| AHI | 1.85 |
| RDI | 1.85 |
| Obstructive apneas (OA) | 9 |
| Hypopneas (H) | 2 |
| Central apneas (CA) | 1 |
| Unclassified apneas (UA) | 0 |
| RERA | 0 |
| Pressure avg | 7.23 cmHâ‚‚O |
| Pressure min | 4.00 cmHâ‚‚O |
| Pressure 90th | 10.40 cmHâ‚‚O |
| Pressure max | 11.32 cmHâ‚‚O |
| Leak avg | 1.21 L/min |
| Leak 90th | 3.6 L/min |
| Leak max | 21.6 L/min |
| Flow-limit p95 | 0.11 |
| Flow-limit p99 | 0.18 |
| Flow-limit min >0.10 | 21.3 |
| Flow-limit min >0.20 | 2.2 |
| Metric | Tonight | 7-day avg | Δ vs 7d | 30-day avg | Δ vs 30d |
|---|---|---|---|---|---|
| AHI | 1.85 | 2.03 | -9% | 1.89 | -2% |
| OA count | 9 | 9.57 | -6% | 9.30 | -3% |
| H count | 2 | 3.14 | -36% | 2.50 | -20% |
| CA count | 1 | 0.43 | +133% | 0.73 | +37% |
| Leak_Avg (L/min) | 1.21 | 0.91 | +33% | 0.82 | +48% |
| Leak_90th (L/min) | 3.6 | 2.57 | +40% | 2.36 | +53% |
| Pressure_Avg | 7.23 | 7.40 | -2% | 7.53 | -4% |
| Pressure_90th | 10.40 | 10.01 | +4% | 10.12 | +3% |
| Usage hours | 6.48 | 6.46 | 0% | 6.59 | -2% |
| Deep sleep % | 8.05 | 14.61 | -6.6 pp | 13.47 | -5.4 pp |
| REM % | 22.47 | 23.13 | -0.7 pp | 23.90 | -1.4 pp |
| Awake min | 13.0 | 10.3 | +26% | 12.0 | +8% |
| Total sleep (min) | 386 | 373 | +4% | 381 | +2% |
| Metric | Recent 7d (09/01–09/07) | Prior 7d (08/25–08/31) | Direction |
|---|---|---|---|
| AHI | 2.03 | 2.20 | ↓ -7.5% |
| OA count | 9.57 | 11.00 | ↓ -13.0% |
| H count | 3.14 | 2.00 | ↑ +57.1% |
| CA count | 0.43 | 1.71 | ↓ -75.0% |
| Leak_Avg | 0.91 | 0.78 | ↑ +15.9% |
| Leak_90th | 2.57 | 2.57 | → 0.0% |
| Pressure_Avg | 7.40 | 7.43 | → -0.4% |
| Pressure_90th | 10.01 | 9.84 | ↑ +1.7% |
Notable: Leak_Avg drift resumed (+15.9% WoW), and hypopnea counts jumped +57% WoW while OA and CA both fell — the event mix is shifting toward partial-obstruction events, which is consistent with the elevated flow-limit exposure this week.
| Date | AHI | OA | H | CA | Leak_Avg | Leak_90th | P_Avg | Hours | Deep% | Awake min |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-07 | 1.85 | 9 | 2 | 1 | 1.21 | 3.6 | 7.23 | 6.48 | 8.05 | 13.0 |
| 2026-09-06 | 1.40 | 7 | 1 | 1 | 0.27 | 0.0 | 6.72 | 6.45 | 17.64 | 10.0 |
| 2026-09-05 | 2.66 | 11 | 5 | 1 | 0.79 | 2.4 | 7.59 | 6.38 | 5.35 | 13.5 |
| 2026-09-04 | 3.37 | 16 | 5 | 0 | 0.31 | 0.0 | 7.37 | 6.23 | 14.66 | 6.5 |
| 2026-09-03 | 2.15 | 11 | 4 | 0 | 1.98 | 7.2 | 7.65 | 6.97 | 15.66 | 15.6 |
| 2026-09-02 | 0.98 | 5 | 1 | 0 | 0.87 | 2.4 | 7.64 | 6.12 | 20.37 | 5.5 |
| 2026-09-01 | 1.82 | 8 | 4 | 0 | 0.91 | 2.4 | 7.60 | 6.58 | 20.53 | 8.0 |
| 2026-08-31 | 2.49 | 14 | 0 | 2 | 0.27 | 1.2 | 7.96 | 6.43 | 20.28 | 11.5 |
| 2026-08-30 | 1.29 | 8 | 0 | 1 | 1.71 | 7.2 | 8.00 | 6.98 | 9.23 | 5.5 |
| 2026-08-29 | 3.07 | 15 | 6 | 0 | 0.93 | 3.6 | 8.23 | 6.85 | 11.53 | 6.0 |
| Pair | the user r |
|---|---|
| AHI ↔ Deep sleep % | +0.12 (none) |
| AHI ↔ Awake minutes | +0.04 (none) |
| Leak_Avg ↔ Deep sleep % | -0.17 (weak negative) |
| Leak_Avg ↔ Awake minutes | -0.04 (none) |
| Leak_90th ↔ Deep sleep % | -0.21 (weak negative) |
| Leak_90th ↔ Awake minutes | -0.04 (none) |
High- vs low-leak bucket comparison (split at Leak_Avg median = 0.77 L/min):
Directional: low-leak nights average 1.2 pp more deep sleep. Tonight sat in the high-leak bucket (Leak_Avg 1.21 > 0.77 median), and deep sleep at 8.05% is -6.1 pp below the high-leak bucket mean — worse than what leak alone would predict. So leak explains part of tonight's picture, but not all of it.
Tonight is a second low-deep night in three, and this time it can't be waved off. After yesterday's rebound (17.64%), deep sleep dropped back to 8.05% — closer to 09-05's 5.35% than to the user's 13.47% 30d baseline. The two-night flag threshold from the 09-06 report was on REM (which came in fine at 22.47%), not deep, but the underlying "sleep architecture is unstable" concern from 09-05 is now revived. Three-night deep sequence: 5.35 → 17.64 → 8.05. That's not measurement noise smoothed out; that's high volatility.
Leak is a plausible contributor tonight — but only partial. Leak_Avg 1.21 is +48% above the 30d baseline, Leak_90th 3.6 is +53% above baseline, and Leak_Max hit 21.6 L/min. Tonight is the highest Leak_Avg since 09-03. Historical correlation between Leak_Avg and Deep% is weak-negative (r = -0.17), and the high-leak bucket averages 14.10% deep — well above tonight's 8.05%. So leak is directionally consistent but the magnitude of the deep drop is larger than leak alone predicts. Something else was in play.
Flow-limit exposure is the more concerning signal. 21.3 min above FL 0.10 is the highest of the recent 10-night window, and FL_p95 at 0.11 sits right at the previously-flagged threshold. Meanwhile hypopnea WoW jumped +57% (3.14 vs 2.00) while OA fell -13%, suggesting the airway is trending toward partial-obstruction physiology rather than full-collapse events. AHI alone (1.85) undersells this because it's dominated by discrete apnea counts; the flow-limit and hypopnea data together indicate more subtle upper-airway resistance that fragmented sleep architecture without producing scoreable apneas.
Device response was measured. Pressure_Avg 7.23 and Pressure_90th 10.40 are both slightly higher than 09-06 (6.72 / 9.44) but well within recent-window norms. The AutoSet nudged pressure up in response to the flow-limit picture, but didn't escalate hard — no runaway pressure. The 90th pressure at 10.40 is at the upper end of the recent range (10-night range now 9.44–10.40), which is consistent with the elevated FL work but not excessive.
AHI story is a non-story tonight. 1.85 sits right on the 30d baseline. The 09-06 "AHI streak broken" narrative held for exactly one night; we're back at baseline, not above it. Central apneas remain the persistent minor pattern (4 of last 8 nights with ≥1 CA), still not clinically material but worth continued tracking.
Total sleep improved modestly. 6h 26m tonight vs 6h 10m on 09-06 (+16 min). Sleep efficiency 96.7%. If REM concentrates in the last third of the night, the longer window may explain why REM held up (22.47%) while deep sank — deep is early-night dominant, and if the early hours were fragmented (by FL/leak), that architecture suffers first.
Watch items rolling forward: - Deep sleep volatility (elevated priority). 5.35 → 17.64 → 8.05 over three nights. If tomorrow lands below 12% (below the 30d baseline again), we have a genuine deep-sleep suppression pattern rather than noise. Flag becomes urgent if 3-of-4 nights come in below baseline. - Leak trend. Recent 7d Leak_Avg 0.91 vs prior 7d 0.78 = +15.9% WoW. The dip on 09-06 (0.27) masked a rising trend. If next 7d Leak_Avg stays above 0.90, that's a mask-fit issue worth acting on (check headgear tension, cushion wear, sleeping position). - Flow-limit exposure. 21.3 min above FL 0.10 tonight is a recent-window high; FL_p95 at the 0.11 threshold. If tomorrow also comes in with Min_Above_010 > 15 and/or FL_p95 ≥ 0.10, that's a two-night pattern suggesting upper-airway resistance is trending up (possibly seasonal allergies, weight change, or position). - Hypopnea WoW +57%. Small counts (3.14 vs 2.00 avg), but the direction combined with elevated FL suggests partial-obstruction physiology. Track next week. - CA count. 4 of last 8 nights with ≥ 1 CA. Continue monitoring.
Subjectively: Despite decent efficiency (96.7%) and adequate total sleep (6h 26m), the low deep sleep and elevated flow-limit exposure suggest tonight was probably not restorative in the way efficiency alone would imply. If the user feels unrested this morning, the architecture data supports that reading.