| Metric | Value |
|---|---|
| Sleep start | 2026-09-05 22:54:59-05:00 |
| Time in bed | 369.8 min (6h 9.8m) |
| Total sleep | 356.3 min (5h 56m) |
| Sleep efficiency | 96.3% |
| Awake time | 13.5 min |
| Core (N1+N2) sleep | 246.9 min / 69.29% |
| Deep (N3) sleep | 19.1 min / 5.35% |
| REM | 90.3 min / 25.35% |
| CPAP usage hours | 6.38 |
| Session count | 1 |
| AHI | 2.66 |
| RDI | 2.82 |
| Obstructive apneas (OA) | 11 |
| Hypopneas (H) | 5 |
| Central apneas (CA) | 1 |
| Unclassified apneas (UA) | 0 |
| RERA | 1 |
| Pressure avg | 7.59 cmHâ‚‚O |
| Pressure min | 4.00 cmHâ‚‚O |
| Pressure 90th | 10.26 cmHâ‚‚O |
| Pressure max | 12.44 cmHâ‚‚O |
| Leak avg | 0.79 L/min |
| Leak 90th | 2.4 L/min |
| Leak max | 19.2 L/min |
| Flow-limit p95 | 0.11 |
| Flow-limit min >0.10 | 19.8 |
| Flow-limit min >0.20 | 7.4 |
| Metric | Tonight | 7-day avg | Δ vs 7d | 30-day avg | Δ vs 30d |
|---|---|---|---|---|---|
| AHI | 2.66 | 2.02 | +32% | 1.89 | +41% |
| OA count | 11 | 10.33 | +6% | 9.17 | +20% |
| H count | 5 | 2.33 | +114% | 2.72 | +84% |
| CA count | 1 | 0.50 | +100% | 0.69 | +45% |
| Leak_Avg (L/min) | 0.79 | 1.01 | -22% | 0.84 | -6% |
| Leak_90th (L/min) | 2.4 | 3.40 | -29% | 2.48 | -3% |
| Pressure_Avg | 7.59 | 7.70 | -1% | 7.57 | 0% |
| Pressure_90th | 10.26 | 10.11 | +1% | 10.10 | +2% |
| Usage hours | 6.38 | 6.55 | -3% | 6.61 | -3% |
| Deep sleep % | 5.35 | 16.79 | -11.4 pp | 13.91 | -8.6 pp |
| REM % | 25.35 | 23.63 | +1.7 pp | 24.17 | +1.2 pp |
| Awake min | 13.5 | 8.8 | +54% | 12.1 | +12% |
| Total sleep (min) | 356 | 377 | -6% | 382 | -7% |
| Metric | Recent 7d (08/30–09/05) | Prior 7d (08/23–08/29) | Direction |
|---|---|---|---|
| AHI | 2.11 | 2.03 | ↑ +4.0% |
| OA count | 10.43 | 9.57 | ↑ +9.0% |
| H count | 2.71 | 2.71 | → 0.0% |
| CA count | 0.57 | 1.29 | ↓ -55.6% |
| Leak_Avg | 0.98 | 0.69 | ↑ +42.5% |
| Leak_90th | 3.26 | 1.89 | ↑ +72.7% |
| Pressure_Avg | 7.69 | 7.17 | ↑ +7.2% |
| Pressure_90th | 10.13 | 9.65 | ↑ +4.9% |
| Date | AHI | OA | H | CA | Leak_Avg | Leak_90th | P_Avg | Hours | Deep% | Awake min |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 2026-08-28 | 2.43 | 12 | 1 | 3 | 0.28 | 0.0 | 6.08 | 6.58 | 13.54 | 6.0 |
| 2026-08-27 | 3.17 | 14 | 4 | 3 | 0.83 | 3.6 | 7.59 | 6.63 | 11.11 | 7.5 |
| Pair | the user r |
|---|---|
| AHI ↔ Deep sleep % | +0.12 (none) |
| AHI ↔ Awake minutes | +0.03 (none) |
| Leak_Avg ↔ Deep sleep % | -0.17 (weak negative) |
| Leak_Avg ↔ Awake minutes | -0.05 (none) |
| Leak_90th ↔ Deep sleep % | -0.20 (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 0.9 pp more deep sleep. Tonight sat just above the low/high split (Leak_Avg 0.79, essentially at the median) — so leak physics doesn't explain the deep-sleep collapse. Deep sleep at 5.35% is 9.87 pp below the low-leak bucket mean and 8.95 pp below the high-leak bucket mean; this is not a leak-driven pattern.
The story tonight is deep sleep, not events. Deep sleep came in at 5.35% — roughly one-third of the user's 30-day baseline (13.91%) and less than a third of the recent 7-day average (16.79%). In absolute terms, only ~19 minutes of N3 across a 5h 56m sleep window. That's the lowest deep-sleep share in the recent 10-night window by a wide margin: the next-lowest was 08-30 at 9.23%, and every other night in the window sat between 11% and 20.5%. REM came in normal-to-slightly-elevated at 25.35% (30d 24.17%), which suggests it isn't a total-sleep-time squeeze — REM held while deep dropped out. The Apple Watch attributed the balance to core (N1+N2) at 69.29%, well above the 30d ~62% typical share, consistent with an unusually shallow night.
AHI is elevated but not clinically alarming. 2.66 sits below the personal mean+1sd threshold (3.21) but above the 30d mean by +41%. Event mix was mostly obstructive (11 OA / 5 H / 1 CA / 1 RERA). Pressure_Avg 7.59 is right on the 30d baseline; the device is not chasing runaway events. Flow-limit exposure was moderate (19.8 min above FL 0.10, 7.4 min above 0.20) — higher than 09-04's 11.4 / 2.4 and comparable to 09-03's 17.1 / 2.9, so there was more sustained upstream airway restriction tonight than 09-04, even though AHI was lower.
Is the deep-sleep drop event-driven? The correlation between AHI and deep sleep across 64 matched nights is essentially zero (r = +0.12), so as a rule these don't move together. Yet the last two nights are both above baseline AHI and off their normal deep-sleep pattern (09-04 deep 14.66% below 7d 16.79%; 09-05 deep 5.35% way below). Two data points don't make a mechanism, but the combination — climbing OA counts, elevated flow-limit exposure, and a deep-sleep drop — is worth watching. It's possible tonight involved an obstructive-event cluster in the middle of the night that fragmented slow-wave sleep without triggering a full awakening (awake time was 13.5 min — up vs the 7d avg but not extreme).
Leak took a step back to baseline. Tonight's Leak_Avg 0.79 and Leak_90th 2.4 are essentially on the 30d baseline (0.84 / 2.48). The 09-03 spike and its aftermath appear to be behind him. But the week-over-week leak numbers are still drifting up — 7d Leak_Avg 0.98 vs prior 7d 0.69 (+43%), and 7d Leak_90th 3.26 vs 1.89 (+73%) — driven by 09-03 and 08-30. Watch whether this normalizes back over the next 3–4 nights.
Watch items rolling forward: - Deep-sleep percentage. If tomorrow comes in below ~10%, this is a two-night pattern worth flagging harder. Anything ≥ 12% and it's likely a one-off. - AHI streak. This is now 4 of 5 nights at AHI ≥ 1.82. If tomorrow lands ≥ 3.21, that's the third night at/above the personal elevated threshold within the recent window. - Flow-limit exposure creeping up (19.8 min above FL 0.10 tonight vs a typical single-digit) — an upstream airway signal the device may not be fully catching. - Leak week-over-week drift.
Subjectively: Only 5.35% deep sleep and 13.5 min awake with sleep efficiency at 96.3% — this probably felt less restorative than the last few nights. Total sleep of 5h 56m is 21 min under the 7d average and ~26 min under the 30d, so the sleep window itself was shorter as well.