Sources: health-report-2026-08-09-to-2026-08-10.json (Apple Watch sleep stages, exported 08:30 on 08-10) + OSCAR_Greg_by_Day_2026-08-09.csv (ResMed AirSense/AirFlow 11 via OSCAR). Session start (22:50 on 08-09) falls on the same calendar date as the CPAP Period, so the match is direct — no midnight-boundary ambiguity tonight. CPAP usage (6.72 h) lines up closely with Apple Watch time-in-bed (6.58 h), confirming the match.
| Metric | Value |
|---|---|
| Bedtime (session start) | 22:50 on 08-09 |
| Time in bed | 6.58 h (394.9 min) |
| Total sleep duration | 6.33 h (379.8 min) |
| Sleep efficiency (TST/TIB) | 96.2% — 25th of 53 matched nights (essentially at the dataset median) |
| Awake time | 15.1 min — above 7-day (13.3), below 30-day (18.4) averages |
| Core sleep | 4.14 h (248.4 min) — 65.4% |
| Deep sleep | 0.69 h (41.6 min) — 10.97% — rank 45/53; below 7-day (14.2%) and 30-day (15.0%) averages |
| REM sleep | 1.50 h (89.8 min) — 23.65% — below 7-day (25.1%), near 30-day (24.5%) averages |
| CPAP usage | 6.72 h — above 7-day avg (6.58 h), near 30-day avg (6.73 h) |
| AHI | 1.34 — below 7-day (2.12) and 30-day (2.00) averages |
| RDI | 1.64 |
| OA / H / CA / UA / RERA | 6 / 3 / 0 / 0 / 2 — H count back to normal (30-day avg 3.5) after last night's spike |
| Pressure avg | 7.79 cmH₂O — above 7-day (7.50), below 30-day (7.81) averages |
| Pressure 90th %ile | 10.94 cmH₂O |
| Leak avg | 3.00 L/min — 3rd-highest of 53 matched nights; ~4.4× the 30-day baseline (0.68) |
| Leak 90th %ile | 10.8 L/min — tied for #1 all-time |
| Compliance flag | 1 (compliant) |
| Date | AHI | OA | H | CA | RERA | Leak avg | Deep % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|---|
| 08-02 | 1.16 | 3 | 3 | 1 | 4 | 0.72 | 14.8% | 4.5 | 98.7% |
| 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% |
Buckets on nightly leak average:
the user r (leak avg vs. deep %): −0.27 (n=53). the user r (leak avg vs. awake min): −0.04. the user r (leak 90th vs. deep %): −0.29. the user r (AHI vs. awake min): +0.05. the user r (AHI vs. deep %): +0.01.
Interpretation: Tonight's leak (3.00) sits deep in the very-high-leak bucket, and its deep% (11.0%) is below even that bucket's mean (13.5%) — consistent with the modest but persistent negative leak↔deep% relationship (r = −0.27 to −0.29 depending on which leak metric). Awake time (15.1 min) is close to the very-high-leak bucket's mean (16.0), so leak isn't obviously fragmenting sleep tonight — the effect, if any, is showing up in stage composition rather than wakefulness. AHI's relationship with sleep architecture remains essentially zero across the full dataset (r ≈ 0.01 for deep%, 0.05 for awake).
| Metric | Tonight (08-09) | 7-day avg (08-02–08-08) | 30-day avg (through 08-08) |
|---|---|---|---|
| AHI | 1.34 | 2.12 | 2.00 |
| Leak avg (L/min) | 3.00 | 0.91 | 0.68 |
| Leak 90th (L/min) | 10.8 | 3.09 | 1.92 |
| Pressure avg (cmH₂O) | 7.79 | 7.50 | 7.81 |
| Usage hours | 6.72 | 6.58 | 6.73 |
| Deep sleep % | 11.0% | 14.2% | 15.0% |
| REM sleep % | 23.65% | 25.1% | 24.5% |
| Awake time (min) | 15.1 | 13.3 | 18.4 |
Leak is the standout — every leak metric is well beyond trailing norms. AHI, pressure, and usage are all essentially business-as-usual or better. Sleep architecture leans slightly worse (deep down, REM down) but not dramatically.
| 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, 5 of 7) | 1.94 | 1.51 | 5 |
Five nights into the new week, leak (1.51) is now more than double the prior week's average (0.70) and the highest weekly leak average since 06-24–06-30's 1.99 — the leak trend flagged since 08-06 has escalated meaningfully with tonight's outlier.
Tonight is a leak event, plain and simple. Leak avg 3.00 L/min is roughly 4× baseline and only exceeded twice in the entire 53-night matched dataset; the 10.8 L/min 90th %ile ties the all-time high. That's not noise — that's a mask/fit/position issue worth checking tonight before sleep: reseat the mask, check the strap tension, look at the cushion for wear, and confirm nothing shifted in the hose or headgear setup. It's also the 5th night in a row of above-baseline leak, so this isn't a one-off; the trend was slow-building through the week, then jumped tonight. The offsetting good news is that respiratory numbers stayed calm — AHI (1.34) is below both trailing averages and last night's hypopnea spike (H=10) fully resolved (H=3, right at the 30-day mean). Sleep architecture leaned worse (deep sleep at 11.0%, one of the lower readings in the dataset), which is directionally consistent with the historical very-high-leak bucket's deep-% mean (13.5%), but a single night isn't proof of causation — the correlation across all 53 nights is only r ≈ −0.27. Net picture: fix the leak, and the rest of the numbers should stay where they are.