Sources: health-report-2026-07-31-to-2026-08-01.json (Apple Watch sleep stages, exported 08:58 on 08-01) + OSCAR_Greg_by_Day_2026-07-31.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (23:25 on 07-31).
Second straight night of elevated awake time: 24.1 minutes tonight, following 27.6 on 07-30. Two consecutive nights above 24 minutes hasn't happened since the 07-24–07-26 run (24.6, 30.6, 26.6 min). Not yet a new trend, but worth watching for a third night in a row.
Leak jumped back up to 1.03 L/min (90th %ile 3.6) after 07-30's near-zero 0.08 — a swing of over 12x night-to-night, underscoring how volatile leak has been in this dataset (7-day avg is now 0.95, roughly back to the mid-July norm).
Deep sleep recovered to 17.9%, back near the recent typical range (17–18%) after 07-30's dip to 11.3%, despite the leak spike — another data point consistent with this dataset's weak leak↔deep relationship on any single night (r = −0.31 through tonight).
| Metric | Value |
|---|---|
| Bedtime (session start) | 23:25 |
| Time in bed | 7.83 h (469.6 min) |
| Total sleep duration | 7.43 h (445.6 min) |
| Sleep efficiency (TST/TIB) | 94.9% |
| Awake time | 24.1 min — 2nd consecutive elevated night |
| Core sleep | 3.82 h (229.3 min) — 51.5% |
| Deep sleep | 1.33 h (79.8 min) — 17.9% |
| REM sleep | 2.27 h (136.5 min) — 30.6% — highest REM% since 07-25 |
| CPAP usage | 7.95 h — longest session in 3+ weeks |
| AHI | 1.51 |
| RDI | 1.51 |
| OA / H / CA / UA / RERA | 7 / 1 / 4 / 0 / 0 — highest CA (central apnea) count of the recent window |
| Pressure avg | 6.98 cmH₂O |
| Pressure 90th %ile | 9.42 cmH₂O |
| Leak avg | 1.03 L/min — sharp rebound from 07-30's 0.08 |
| Leak 90th %ile | 3.6 L/min |
| Date | AHI | OA | RERA | Leak avg | Leak 90th | Deep % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|
| 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% |
| 07-31 | 1.51 | 7 | 0 | 1.03 | 3.6 | 17.9% | 24.1 | 94.9% |
Split at leak ≤ 0.30 vs > 0.30 L/min (07-31's leak of 1.03 falls into the higher-leak bucket):
the user r (leak avg vs. deep %): −0.31 (n=40). the user r (leak avg vs. awake min): +0.07. the user r (AHI vs. awake min): +0.18. the user r (AHI vs. deep %): −0.02.
Interpretation: Tonight lands in the higher-leak bucket with deep% (17.9%) actually above that bucket's mean (15.7%) and close to the low-leak bucket's mean (18.1%) — again illustrating that leak level alone is a weak predictor of any single night's deep-sleep outcome, even though the moderate negative association holds up in aggregate.
| Metric | Tonight (07-31) | 7-day avg (07-25–07-31) | 30-day avg (07-02–07-31) |
|---|---|---|---|
| AHI | 1.51 | 1.67 | 2.10 |
| Leak avg (L/min) | 1.03 | 0.95 | 0.59 |
| Pressure avg (cmH₂O) | 6.98 | 7.16 | 8.07 |
| Usage hours | 7.95 | 6.84 | 6.63 |
| Deep sleep % | 17.9% | 15.3% | 16.7% |
| REM sleep % | 30.6% | 26.1% | 24.8% |
| Awake time (min) | 24.1 | 18.6 | 16.4 |
CPAP usage (7.95 h) is well above both trailing windows — the longest session in the recent dataset. REM% (30.6%) is the highest of the trailing week and above the 30-day baseline. AHI continues to run below both the 7-day and 30-day averages. Leak sits close to the 7-day average but nearly double the 30-day average, continuing the pattern of leak drifting upward relative to the broader baseline over the past couple of weeks.
| 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 | 7* |
* Week now has 7 of 7 nights logged in the underlying CPAP data (through 08-01); this row's average will be finalized once the full week closes.
Awake time has now run elevated for two straight nights (27.6, then 24.1 min) — the first back-to-back elevated stretch since 07-24–07-26. Neither night shows an obvious CPAP-side driver (leak and AHI moved in opposite directions between the two nights), so this looks more like a short stretch of restlessness than something CPAP-related. Worth flagging if a third night follows the same pattern.
Central apnea (CA) count of 4 tonight is the highest in the recent window — worth noting though still low in absolute terms and not reflected in an elevated AHI (1.51, below both trailing averages).
Usage hours and REM% both hit multi-week highs tonight (7.95 h, 30.6%) — a genuinely strong night on those two dimensions even amid the elevated awake time, suggesting the extra time in bed translated mostly into additional REM rather than additional wake.