Sources: health-report-2026-07-30-to-2026-07-31.json (Apple Watch sleep stages, exported 08:18 on 07-31) + OSCAR_Greg_by_Day_2026-07-30.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (23:47 on 07-30).
The 3-night streak of very low awake time just broke. After 07-27/07-28/07-29 posted 5.5, 11.5, and 4.0 minutes awake (97–99% efficiency), tonight jumped to 27.6 minutes awake / 93.3% efficiency — back in line with the pre-07-27 pattern (24–31 min was typical 07-24 to 07-26). Not an outlier vs. the broader trend, but a clear end to that short run.
Deep sleep dropped to 11.3%, the lowest reading since 07-20 (8.3%) and well below the trailing 7-day average (15.1%) and 30-day average (16.6%). Leak was essentially zero tonight (0.08 L/min avg), so this dip isn't leak-associated — consistent with this dataset's persistent finding that leak explains only a modest share of deep-sleep variance (r = −0.31 through tonight).
Pressure rose off its recent floor: 7.35 cmH₂O tonight, up from the 07-27–07-29 lows (6.87 → 6.77 → 6.63) and back above the 7-day average (7.20). The 3-night pressure decline flagged in the 07-29 report did not continue into a 4th night.
| Metric | Value |
|---|---|
| Bedtime (session start) | 23:47 |
| Time in bed | 6.92 h (415.0 min) |
| Total sleep duration | 6.46 h (387.4 min) |
| Sleep efficiency (TST/TIB) | 93.3% |
| Awake time | 27.6 min — highest since 07-26 |
| Core sleep | 4.45 h (266.9 min) — 68.9% |
| Deep sleep | 0.73 h (43.7 min) — 11.3% — lowest since 07-20 |
| REM sleep | 1.28 h (76.8 min) — 19.8% |
| CPAP usage | 7.08 h |
| AHI | 1.98 |
| RDI | 1.98 |
| OA / H / CA / UA / RERA | 13 / 0 / 1 / 0 / 0 |
| Pressure avg | 7.35 cmH₂O — up from 3-night low |
| Pressure 90th %ile | 9.06 cmH₂O |
| Leak avg | 0.08 L/min — near-zero, lowest in the recent window |
| Leak 90th %ile | 0.0 L/min |
| Date | AHI | OA | RERA | Leak avg | Leak 90th | Deep % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|
| 07-23 | 1.29 | 7 | 0 | 0.48 | 2.4 | 25.5% | 13.0 | 96.8% |
| 07-24 | 2.34 | 15 | 0 | 0.48 | 0.0 | 16.7% | 24.6 | 93.9% |
| 07-25 | 1.72 | 10 | 0 | 1.69 | 7.2 | 9.9% | 30.6 | 92.5% |
| 07-26 | 1.24 | 5 | 0 | 0.39 | 0.0 | 14.3% | 26.6 | 92.9% |
| 07-27 | 1.6 | 8 | 0 | 1.19 | 2.4 | 18.0% | 5.5 | 98.5% |
| 07-28 | 2.01 | 8 | 2 | 0.77 | 2.4 | 17.8% | 11.5 | 97.2% |
| 07-29 | 1.62 | 7 | 2 | 1.52 | 6.0 | 17.8% | 4.0 | 98.9% |
| 07-30 | 1.98 | 13 | 0 | 0.08 | 0.0 | 11.3% | 27.6 | 93.3% |
Split at leak ≤ 0.30 vs > 0.30 L/min (07-30's leak of 0.08 falls into the low-leak bucket):
the user r (leak avg vs. deep %): −0.31 (n=39). the user r (leak avg vs. awake min): +0.07. the user r (AHI vs. awake min): +0.20. the user r (AHI vs. deep %): −0.02.
Interpretation: Tonight sits in the low-leak bucket but posted below-average deep sleep (11.3% vs. the bucket's 18.1% mean) and above-average awake time (27.6 vs. 14.9 min) — the opposite of what the leak↔architecture association would predict. This is a reminder that the leak↔deep association (r = −0.31), while the strongest relationship in this dataset, still leaves most night-to-night variance unexplained; other factors (sleep timing, prior-day activity, etc., none captured here) are clearly at work.
| Metric | Tonight (07-30) | 7-day avg (07-24–07-30) | 30-day avg (07-01–07-30) |
|---|---|---|---|
| AHI | 1.98 | 1.79 | 2.21 |
| Leak avg (L/min) | 0.08 | 0.87 | 0.76 |
| Pressure avg (cmH₂O) | 7.35 | 7.20 | 8.14 |
| Usage hours | 7.08 | 6.68 | 6.59 |
| Deep sleep % | 11.3% | 15.1% | 16.6% |
| REM sleep % | 19.8% | 25.2% | 24.5% |
| Awake time (min) | 27.6 | 18.6 | 16.1 |
Leak is at its lowest point in weeks — well under both trailing averages. But that didn't translate into better sleep architecture tonight: deep % came in below both the 7-day and 30-day averages, and awake time ran about 1.5–1.7x the trailing averages. AHI and pressure both sit close to the 7-day average.
| Week | AHI avg | Leak avg | n |
|---|---|---|---|
| 06-22 to 06-28 | 2.84 | 1.98 | 7 |
| 06-29 to 07-05 | 3.24 | 1.41 | 7 |
| 07-06 to 07-12 | 3.00 | 0.43 | 7 |
| 07-13 to 07-19 | 2.22 | 0.42 | 7 |
| 07-20 to 07-26 | 1.43 | 0.71 | 7 |
| 07-27 to 08-02 (current, partial) | 1.55 | 0.83 | 6* |
* Partial week (6 of 7 nights so far, through 08-01 in the underlying data; 07-30 itself contributes an AHI of 1.98 and leak of 0.08 to this week's average).
Trailing 7-day AHI (ending 07-30) ticked up slightly (1.44 → 1.79) as several lower-AHI nights (07-20 through 07-23) aged out. Still well below the 06-22–07-12 range (2.84–3.24).
The low-awake-time streak (07-27–07-29) has ended, not continued. Tonight's 27.6 minutes is back in the range seen 07-24 through 07-26 (24.6–30.6 min), suggesting the prior 3-night streak was itself the notable event rather than a new baseline. Worth watching whether awake time settles back down or keeps climbing over the next few nights.
Deep sleep at 11.3% is the standalone number worth tracking — it's the lowest reading in 10 days and came on a night with essentially no leak, reinforcing that factors beyond leak and AHI are driving a meaningful share of the night-to-night swings in deep sleep.
Pressure's rebound to 7.35 (from the 6.63–6.87 floor of 07-27–07-29) suggests the auto-titration algorithm is still actively adjusting rather than having settled at a new steady-state — worth continued tracking rather than treating either the decline or this rebound as the new normal.