Sources: health-report-2026-08-10-to-2026-08-11.json (Apple Watch sleep stages, exported 05:47 on 08-11) + OSCAR_Greg_by_Day_2026-08-10.csv (ResMed AirSense/AirFlow 11 via OSCAR). Session start (23:09 on 08-10) is on the same calendar date as the CPAP Period, so the match is direct. CPAP usage (5.20 h) is meaningfully shorter than Apple Watch time in bed (6.35 h) — see caveats.
| Metric | Value |
|---|---|
| Bedtime (session start) | 23:09 on 08-10 |
| Time in bed | 6.35 h (380.8 min) |
| Total sleep duration | 6.01 h (360.8 min) |
| Sleep efficiency (TST/TIB) | 94.7% — rank 38/54 (below median; drag from higher awake time) |
| Awake time | 20.1 min — above 7-day (14.8) and slightly above 30-day (18.1) |
| Core sleep | 3.87 h (232.3 min) — 64.4% |
| Deep sleep | 0.92 h (55.2 min) — 15.30% — rank 29/54, at 30-day avg (14.88%) |
| REM sleep | 1.22 h (73.3 min) — 20.31% — below 7-day (24.6%) and 30-day (24.4%); short in absolute terms |
| CPAP usage | 5.20 h — 1.5 h below both 7-day (6.68) and 30-day (6.70) averages; shortest since 07-14 |
| AHI | 0.58 — 2nd-lowest of 54 matched nights; well below 7-day (2.14) and 30-day (1.95) |
| RDI | 0.58 |
| OA / H / CA / UA / RERA | 3 / 0 / 0 / 0 / 0 — zero hypopneas, centrals, and RERAs |
| Pressure avg | 6.89 cmH₂O — below 7-day (7.50) and 30-day (7.78) averages |
| Pressure 90th %ile | 9.46 cmH₂O |
| Leak avg | 0.17 L/min — down from 3.00 last night (~94% drop); below 30-day baseline (0.77) |
| Leak 90th %ile | 0.0 L/min — down from 10.8 last night (tied all-time high) |
| Compliance flag | 1 (compliant) |
| Date | AHI | OA | H | CA | RERA | Leak avg | Deep % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|---|
| 08-03 | 2.24 | 5 | 8 | 3 | 2 | 0.70 | 12.1% | 10.5 | 97.5% |
| 08-04 | 3.07 | 14 | 5 | 2 | 1 | 0.43 | 8.5% | 35.6 | 91.6% |
| 08-05 | 1.49 | 7 | 2 | 1 | 0 | 1.90 | 11.3% | 10.5 | 97.3% |
| 08-06 | 2.83 | 11 | 4 | 2 | 1 | 0.56 | 15.9% | 9.5 | 97.3% |
| 08-07 | 1.69 | 8 | 2 | 1 | 1 | 1.20 | 20.5% | 6.5 | 98.3% |
| 08-08 | 2.34 | 6 | 10 | 0 | 0 | 0.87 | 16.2% | 15.6 | 96.1% |
| 08-09 | 1.34 | 6 | 3 | 0 | 2 | 3.00 | 11.0% | 15.1 | 96.2% |
| 08-10 | 0.58 | 3 | 0 | 0 | 0 | 0.17 | 15.3% | 20.1 | 94.7% |
Buckets on nightly leak average:
the user r (leak avg vs. deep %): −0.27 (n=54). the user r (leak 90th vs. deep %): −0.29. the user r (leak avg vs. awake min): −0.04. the user r (AHI vs. deep %): +0.02. the user r (AHI vs. awake min): +0.04.
Interpretation: Tonight's leak (0.17) sits deep in the low-leak bucket, and deep% (15.3%) is between the low-leak bucket's mean (17.8%) and the very-high-leak bucket's mean (13.5%) — directionally consistent with the persistent weak-negative leak↔deep% relationship, but no single-night proof either way. The bigger story is that the leak↔deep% correlation holds up in the aggregate (r = −0.27 to −0.29) while AHI's relationship with sleep architecture remains essentially zero — leak, not respiratory-event count, appears to be the more relevant lever for deep-sleep quality in the historical data.
| Metric | Tonight (08-10) | 7-day avg (08-03–08-09) | 30-day avg (through 08-09) |
|---|---|---|---|
| AHI | 0.58 | 2.14 | 1.95 |
| Leak avg (L/min) | 0.17 | 1.24 | 0.77 |
| Leak 90th (L/min) | 0.0 | 4.46 | 2.28 |
| Pressure avg (cmH₂O) | 6.89 | 7.50 | 7.78 |
| Usage hours | 5.20 | 6.68 | 6.70 |
| Deep sleep % | 15.30% | 13.65% | 14.88% |
| REM sleep % | 20.31% | 24.56% | 24.39% |
| Awake time (min) | 20.1 | 14.8 | 18.1 |
AHI, leak, and pressure are all firmly below trailing norms — the best respiratory night in the trailing window by a wide margin. Deep % beat the trailing week and sits at the monthly average. The two negatives are (a) usage hours, ~1.5 h short of trend, and (b) REM %, which is below trend mostly because of the shorter TST rather than a stage-composition issue.
| Week | AHI avg | Leak avg | n |
|---|---|---|---|
| 06-17 to 06-23 | 1.24 | 0.24 | 6 |
| 06-24 to 06-30 | 3.74 | 1.99 | 7 |
| 07-01 to 07-07 | 2.66 | 1.22 | 7 |
| 07-08 to 07-14 | 2.78 | 0.52 | 7 |
| 07-15 to 07-21 | 1.82 | 0.43 | 7 |
| 07-22 to 07-28 | 1.68 | 0.87 | 7 |
| 07-29 to 08-04 | 1.74 | 0.70 | 7 |
| 08-05 to 08-11 (partial, 6 of 7) | 1.71 | 1.28 | 6 |
Tonight brings the current week's leak average down from 1.51 (last report) to 1.28, and the AHI average from 1.94 to 1.71 — both moving in the right direction after last night's outlier. The week still runs elevated on leak vs. the prior three weeks (0.43–0.87 range) because the 08-09 spike dominates the average; two more nights near tonight's level would bring the week back into the recent baseline range.
Big night in the right direction. Whatever adjustment happened after last night's leak spike worked cleanly: leak metrics are essentially at zero (avg 0.17, 90th 0.0), AHI is the second-lowest in the dataset (0.58), and respiratory event counts are the cleanest of the trailing week (3 OA, everything else zero). The 5-night elevated-leak stretch is broken, and this proves last night was a solvable mask/fit issue rather than a structural change. Deep sleep recovered to the dataset median even in a shorter sleep window, which is a real positive — the last three weeks have had multiple nights below 12% deep, so 15.3% on a short night is directionally good. Two soft watch-items: usage hours came in at 5.20 (below the 7-day average by 1.5 h — probably driven by the sleep window rather than mask compliance, since the leak and event data suggest the mask was on and working the entire time), and REM% ran short in absolute terms (73 min) because of the shorter TST. Neither is a flag — worth noting only in case a pattern of shorter nights starts to form.