Sources: health-report-2026-07-28-to-2026-07-29.json (Apple Watch sleep stages, exported 05:44 on 07-29) + OSCAR_Greg_by_Day_2026-07-28.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (22:36 on 07-28).
Second consecutive night of excellent awake time and efficiency. Awake time was 11.5 min (97.2% efficiency), following 07-27's record 5.5 min (98.5%). Both readings sit well below the current 7-day average (17.4 min) and the 30-day average (15.9 min). This confirms the recovery from the 07-25/07-26 disruption (30.6 min and 26.6 min awake, respectively) is holding across two nights, not a single-night blip.
AHI ticked up to 2.01 — the highest reading since 07-24 (2.34) — with RERA count doubling to 2, the highest of the last 8 nights (every other night in that window had 0–1 RERA events). Still well within the normal range (AHI < 5) and not paired with any awake-time or efficiency problem, but it's the second data point (after 07-24) suggesting AHI hasn't fully settled at the very low 07-20/07-21 levels (0.88–0.94). One night — not yet a trend — worth watching over the next few reports.
Pressure avg has now run low for two straight nights (6.77 tonight, 6.87 on 07-27), both well below the 7-day average (7.41) and the 30-day average (8.26). No adverse effect on AHI or awake time either night — logged for tracking.
Leak (0.77 L/min) is unremarkable — mid-pack of the last 14 nights, close to both trailing averages (7-day 0.87, 30-day 0.85). No leak-driven concern tonight.
| Metric | Value |
|---|---|
| Bedtime (session start) | 22:36 |
| Time in bed | 6.88 h (413.0 min) |
| Total sleep duration | 6.69 h (401.4 min) |
| Sleep efficiency (TST/TIB) | 97.2% |
| Awake time | 11.5 min — well below trailing averages |
| Core sleep | 3.74 h (224.3 min) — 55.9% |
| Deep sleep | 1.19 h (71.3 min) — 17.8% |
| REM sleep | 1.76 h (105.9 min) — 26.4% |
| CPAP usage | 6.97 h |
| AHI | 2.01 — highest since 07-24 |
| RDI | 2.3 |
| OA / H / CA / UA / RERA | 8 / 5 / 0 / 1 / 2 — highest RERA of last 8 nights |
| Pressure avg | 6.77 cmH₂O — 2nd straight low reading |
| Pressure 90th %ile | 9.38 cmH₂O |
| Leak avg | 0.77 L/min |
| Leak max | 24.0 L/min |
| Leak 90th %ile | 2.4 L/min |
| Date | AHI | OA | RERA | Leak avg | Leak 90th | Deep % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|
| 07-21 | 0.88 | 4 | 1 | 0.85 | 1.2 | 28.4% | 27.1 | 93.3% |
| 07-22 | 1.59 | 7 | 1 | 1.08 | 2.4 | 12.0% | 10.0 | 97.5% |
| 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% |
Split at leak ≤ 0.30 vs. > 0.30 L/min (07-28's leak of 0.77 falls into the higher-leak bucket):
the user r (leak avg vs. deep %): −0.33 (n=37). the user r (leak avg vs. awake min): +0.15. the user r (AHI vs. awake min): +0.22. the user r (AHI vs. deep %): −0.02.
Interpretation: Same picture as recent reports — leak has a moderate negative association with deep sleep (higher-leak nights average ~3 points lower deep %), while leak/AHI's relationship with awake time remains weak (|r| ≤ 0.22). Tonight fits the weak-correlation pattern rather than contradicting it: a moderate-leak, moderately-elevated-AHI night still produced a low awake-time reading, continuing the pattern seen on 07-27.
| Metric | Tonight (07-28) | 7-day avg (07-22–07-28) | Prior 7-day avg (07-21–07-27) | 30-day avg (06-29–07-28) |
|---|---|---|---|---|
| AHI | 2.01 | 1.68 | 1.52 | 2.44 |
| Leak avg (L/min) | 0.77 | 0.87 | 0.88 | 0.85 |
| Pressure avg (cmH₂O) | 6.77 | 7.41 | 7.42 | 8.26 |
| Usage hours | 6.97 | 6.76 | 6.75 | 6.59 |
| Deep sleep % | 17.8% | 16.3% | 17.83% | 16.8% |
| REM sleep % | 26.4% | 26.69% | 26.47% | 24.48% |
| Awake time (min) | 11.5 | 17.4 | 19.6 | 15.9 |
AHI is above both trailing 7-day windows but comfortably below the 30-day average — consistent with a modest uptick rather than a new baseline. Pressure continues to run below both trailing windows for a second night. Awake time remains a bright spot: well under all three comparison windows, extending the post-07-25/26 recovery.
| Week | AHI avg | Leak avg | n |
|---|---|---|---|
| 06-22 to 06-28 | 2.84 | 1.98 | 7 |
| 06-29 to 07-05 | 3.60 | 1.49 | 6* |
| 07-06 to 07-12 | 3.00 | 0.43 | 7 |
| 07-13 to 07-19 | 2.13 | 0.45 | 6* |
| 07-21 to 07-27 (prior trailing 7d) | 1.52 | 0.88 | 7 |
| 07-22 to 07-28 (current trailing 7d) | 1.68 | 0.87 | 7 |
* n=6 because one night in that week (07-03 and 07-17 respectively) has no matched Apple Watch sleep session — see caveats. This differs slightly from the night counts implied in earlier reports; treat as a recomputation artifact, not a data change.
Trailing 7-day AHI rose slightly (1.52 → 1.68) as 07-21's low reading (0.88) aged out and tonight's 2.01 aged in — still well below the 06-22–07-19 range (2.13–3.60). Leak trend is essentially flat (0.88 → 0.87).
Awake time and efficiency continue to look strong for a second straight night (11.5 min / 97.2%, after 07-27's 5.5 min / 98.5%), reinforcing that the 07-25/07-26 disruption was a short-lived event rather than an emerging pattern. This holds even with AHI ticking up tonight — further evidence that awake time isn't being driven primarily by AHI or leak on a night-to-night basis (consistent with the weak correlations above).
AHI/RERA worth a light watch, not yet a flag: 2.01 AHI and 2 RERA events are the highest readings in over a week. One night isn't a trend, but if AHI keeps climbing over the next few reports, it would be worth cross-checking pressure settings or mask fit.
Pressure: Two consecutive nights of low pressure averages (6.77, 6.87) without any negative effect on AHI or sleep quality — logged for tracking only.
oscar_data.csv) — included in the leak ≤0.30 bucket in Section 2 as literal low readings, though a 0.0 that early may reflect incomplete data capture rather than a true zero-leak night.