| Metric | Value |
|---|---|
| Sleep start | 2026-09-06 23:34:19-05:00 |
| Time in bed | 379.9 min (6h 19.9m) |
| Total sleep | 369.8 min (6h 9.8m) |
| Sleep efficiency | 97.4% |
| Awake time | 10.0 min |
| Core (N1+N2) sleep | 232.8 min / 62.96% |
| Deep (N3) sleep | 65.2 min / 17.64% |
| REM | 71.8 min / 19.40% |
| CPAP usage hours | 6.45 |
| Session count | 1 |
| AHI | 1.4 |
| RDI | 1.86 |
| Obstructive apneas (OA) | 7 |
| Hypopneas (H) | 1 |
| Central apneas (CA) | 1 |
| Unclassified apneas (UA) | 0 |
| RERA | 3 |
| Pressure avg | 6.72 cmHâ‚‚O |
| Pressure min | 4.00 cmHâ‚‚O |
| Pressure 90th | 9.44 cmHâ‚‚O |
| Pressure max | 11.82 cmHâ‚‚O |
| Leak avg | 0.27 L/min |
| Leak 90th | 0.0 L/min |
| Leak max | 14.4 L/min |
| Flow-limit p95 | 0.08 |
| Flow-limit min >0.10 | 14.4 |
| Flow-limit min >0.20 | 3.8 |
| Metric | Tonight | 7-day avg | Δ vs 7d | 30-day avg | Δ vs 30d |
|---|---|---|---|---|---|
| AHI | 1.40 | 2.11 | -34% | 1.92 | -27% |
| OA count | 7 | 10.29 | -32% | 9.13 | -23% |
| H count | 1 | 2.86 | -65% | 2.63 | -62% |
| CA count | 1 | 0.57 | +75% | 0.67 | +50% |
| Leak_Avg (L/min) | 0.27 | 0.98 | -72% | 0.84 | -68% |
| Leak_90th (L/min) | 0.0 | 3.26 | -100% | 2.48 | -100% |
| Pressure_Avg | 6.72 | 7.69 | -13% | 7.57 | -11% |
| Pressure_90th | 9.44 | 10.13 | -7% | 10.11 | -7% |
| Usage hours | 6.45 | 6.53 | -1% | 6.60 | -2% |
| Deep sleep % | 17.64 | 15.15 | +2.5 pp | 13.61 | +4.0 pp |
| REM % | 19.40 | 23.87 | -4.5 pp | 24.21 | -4.8 pp |
| Awake min | 10.0 | 9.5 | +6% | 12.1 | -18% |
| Total sleep (min) | 370 | 374 | -1% | 381 | -3% |
| Metric | Recent 7d (09/01–09/06, n=7*) | Prior 7d (08/24–08/30, n=7) | Direction |
|---|---|---|---|
| AHI | 2.12 | 2.10 | → +1.1% |
| OA count | 10.29 | 10.29 | → 0.0% |
| H count | 2.86 | 2.43 | ↑ +17.6% |
| CA count | 0.57 | 1.43 | ↓ -60.0% |
| Leak_Avg | 0.77 | 0.80 | → -3.1% |
| Leak_90th | 2.23 | 2.40 | ↓ -7.1% |
| Pressure_Avg | 7.50 | 7.24 | ↑ +3.7% |
| Pressure_90th | 10.04 | 9.57 | ↑ +4.8% |
*Recent 7d window is 09/01–09/06 (6 nights) plus 08-31, aligning with the last 7 CPAP nights ending on 09-06.
| Date | AHI | OA | H | CA | Leak_Avg | Leak_90th | P_Avg | Hours | Deep% | Awake min |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 2026-08-28 | 2.43 | 12 | 1 | 3 | 0.28 | 0.0 | 6.08 | 6.58 | 13.54 | 6.0 |
| Pair | the user r |
|---|---|
| AHI ↔ Deep sleep % | +0.09 (none) |
| AHI ↔ Awake minutes | +0.05 (none) |
| Leak_Avg ↔ Deep sleep % | -0.19 (weak negative) |
| Leak_Avg ↔ Awake minutes | -0.04 (none) |
| Leak_90th ↔ Deep sleep % | -0.23 (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 well inside the low-leak bucket (Leak_Avg 0.27, 3rd-lowest of the 10-night window), and deep sleep at 17.64% is +2.2 pp above the low-leak bucket mean — consistent with the pattern.
Tonight is a clean-up night after 09-05's outlier. Deep sleep recovered from 5.35% to 17.64% — above baseline — while events dropped (AHI 1.4, the lowest since 09-02) and leak went to essentially zero. The five-night AHI ≥ 1.82 streak snapped. The signal on 09-05 (very low deep, elevated events, uptick in flow-limit exposure) did not persist into 09-06, which supports reading 09-05 as a one-off rather than the start of a trend. It's worth noting the two possible contributors — measurement noise on Apple Watch deep-sleep detection, or a single fragmented night — but tonight's normalization is the strongest evidence against a sustained problem.
REM is the one soft spot. At 19.40%, REM tonight is the lowest of the last 8 nights and ~4.8 pp below the 30d average. Set against Core at 62.96% (right at typical) and Deep at 17.64% (above baseline), it looks like tonight redistributed sleep architecture toward deep at the expense of REM — the opposite of last night's pattern (very high Core 69.29%, very low Deep 5.35%, above-average REM 25.35%). REM tends to concentrate in the latter half of a sleep window, and tonight's total sleep of 6h 9.8m is on the shorter end of the user's 30d distribution (30d avg 6h 21m), which is a plausible mechanical explanation: shorter window = less REM real estate.
Device physics were relaxed. Pressure_Avg 6.72 and Pressure_90th 9.44 are the lowest of the recent 10-night window. With leak at 0 and event counts low, the AutoSet had less to react to. Flow-limit exposure (14.4 min above FL 0.10, 3.8 min above 0.20) is lower than 09-05's (19.8 / 7.4) though not negligible — mid-range for the recent window. RERAs at 3 (RDI 1.86) is slightly elevated but consistent with the modest flow-limit picture; airway wasn't perfectly quiet, but the device didn't need to escalate pressure to manage it.
Week-over-week has flattened. The leak drift called out on the 09-05 report has reversed — recent 7d Leak_Avg 0.77 vs prior 7d 0.80 (essentially flat), and Leak_90th 2.23 vs 2.40 (down 7%). Pressure is drifting up mildly (Pressure_Avg 7.50 vs 7.24, +3.7%), but this is a small movement over one week and is consistent with the device responding to elevated event/flow-limit counts earlier in the window. AHI week-over-week is flat (2.12 vs 2.10).
Watch items rolling forward: - REM percentage. If tomorrow also comes in <20%, that's a two-night pattern to note. Anything ≥22% and it's a one-off. - CA count. Tonight had 1 CA, and 3 of the last 7 nights had ≥1 CA — worth tracking as a mild pattern but not yet notable in absolute terms. - Pressure_Avg drift week-over-week (+3.7%). Small, but the direction has been up for two consecutive weeks — check next week.
Subjectively: With sleep efficiency at 97.4%, awake time at 10 min, deep sleep back near normal, and events low, this should have been a more restorative night than 09-05. The shortish total sleep (6h 10m) is the main mechanical caveat.