Sources: health-report-2026-07-23-to-2026-07-24.json (Apple Watch sleep stages, exported 05:36 on 07-24) + OSCAR_Greg_by_Day_2026-07-23.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (22:32 on 07-23).
Leak avg dropped sharply (1.08 → 0.48 L/min), breaking the 2-night escalation streak — but the 90th-percentile leak held at 2.4 L/min for the second consecutive night. Average leak is back below the 1.0 L/min watch threshold, which is a positive sign. However, the 90th percentile remaining at 2.4 means significant sustained leak episodes are still occurring during the night; only their frequency or duration decreased. If tomorrow (07-24) shows 90th-pct ≥ 2.0 again, a mask cushion inspection is warranted regardless of avg.
Deep sleep hit 25.5% (101.4 min) — second highest in the 8-night dataset. After 07-21's recovery night (28.4%), tonight produced another exceptional deep-sleep result. Two of the three highest deep-sleep nights in the matched dataset are 07-21 and 07-23, separated by only two nights. This is unusual clustering and may reflect ongoing slow-wave recovery from earlier cumulative deficit, a favorable sleep-timing pattern, or simply natural variability. No action needed, but tracking whether this persists or reverts toward the 12–16% baseline.
AHI continues declining: 1.29 tonight, trailing 7-day now 1.59 (vs 1.62 prior trailing 7d). The multi-week downward trend from the early-July peak of 3.24 remains intact. RERA count was 0 tonight for the first time in several nights.
| Metric | Value |
|---|---|
| Bedtime (session start) | 22:32 |
| Time in bed | 6.85 h (411.0 min) |
| Total sleep duration | 6.63 h (397.9 min) |
| Sleep efficiency (TST/TIB) | 96.8% |
| Awake time | 13.0 min |
| Core sleep | 3.28 h (196.7 min) — 49.4% |
| Deep sleep | 1.69 h (101.4 min) — 25.5% — 2nd highest in dataset |
| REM sleep | 1.66 h (99.9 min) — 25.1% |
| CPAP usage | 6.95 h |
| AHI | 1.29 |
| RDI | 1.29 |
| OA / H / CA / UA / RERA | 7 / 1 / 1 / 0 / 0 |
| Pressure avg | 7.88 cmH₂O |
| Pressure 90th %ile | 10.78 cmH₂O |
| Pressure max | 12.74 cmH₂O |
| Leak avg | 0.48 L/min ↓ (vs 1.08 prior night) |
| Leak max | 13.2 L/min |
| Leak 90th %ile | 2.4 L/min (unchanged from prior night) |
| Date | AHI | RERA | Leak avg | Leak 90th | Deep % | Deep (min) | REM % | Awake (min) | Efficiency |
|---|---|---|---|---|---|---|---|---|---|
| 07-16 | 1.50 | 3 | 0.13 | 0 | 16.6% | ~70 | 20.6% | 12.5 | 96.3% |
| 07-17 | 2.78 | 0 | 0.27 | 1.2 | 16.4% | ~69 | 30.0% | 7.0 | 98.2% |
| 07-18 | 2.35 | 0 | 0.54 | 0 | 14.7% | ~63 | 23.1% | 36.6 | 90.3% |
| 07-19 | 1.29 | 1 | 0.92 | 0 | 10.1% | ~43 | 17.0% | 14.0 | 96.2% |
| 07-20 | 0.94 | 0 | 0.03 | 0 | 8.3% | 29.6 | 21.0% | 21.1 | 94.4% |
| 07-21 | 0.88 | 1 | 0.85 | 1.2 | 28.4% | 106.9 | 24.8% | 27.1 | 93.3% |
| 07-22 | 1.59 | 1 | 1.08 | 2.4 | 12.0% | 47.7 | 31.6% | 10.0 | 97.6% |
| 07-23 | 1.29 | 0 | 0.48 | 2.4 | 25.5% | 101.4 | 25.1% | 13.0 | 96.8% |
| Night | Leak avg | Leak 90th | Leak max |
|---|---|---|---|
| 07-21 | 0.85 | 1.2 | 22.8 |
| 07-22 | 1.08 ↑ | 2.4 ↑ | 31.2 ↑ |
| 07-23 | 0.48 ↓ | 2.4 → | 13.2 ↓ |
The avg and max have both improved meaningfully. The 90th percentile staying flat at 2.4 suggests a persistent structural component to the leak (likely mask position during specific sleep phases) that the lower average masks. On nights where the 90th pct is 0 (07-16, 07-18, 07-19, 07-20), leak is brief and positional. Two consecutive nights with 90th pct ≥ 2.0 is the new threshold to watch on 07-24.
Split at leak ≤ 0.30 vs. > 0.30 L/min:
the user r (leak avg vs. deep %): +0.13 — directionally flat; the two recovery-pattern nights (07-21, 07-23) inflate deep sleep while also having elevated leak, suppressing any negative correlation. the user r (leak avg vs. awake min): +0.03 — effectively zero across 8 nights.
Interpretation: The split analysis above (excluding recovery nights) continues to show that higher-leak nights associate with more awake time (~20 vs. 13 min). However, n=8 is insufficient for reliable inference, and the recovery-night confound makes this pattern tentative. Tonight's 13.0 min awake time despite 2.4 L/min leak 90th pct is consistent with the prior night's finding that acute leak episodes aren't disrupting sleep continuity when they occur.
| Metric | Tonight (07-23) | 7-day avg (07-17–07-23) | Prior 7-day avg (07-16–07-22) | 30-day avg (≈06-23–07-22)† |
|---|---|---|---|---|
| AHI | 1.29 | 1.59 | 1.62 | ~2.70 |
| RDI | 1.29 | — | 1.76 | — |
| RERA | 0 | — | 0.86 | ~1.14 |
| Pressure avg (cmH₂O) | 7.88 | 8.00 | 8.10 | 8.49 |
| Leak avg (L/min) | 0.48 | 0.60 | 0.55 | 1.05‡ |
| Usage hours | 6.95 | 6.59 | 6.45 | 6.53 |
| Deep sleep % | 25.5% | 16.5%§ | 15.2%§ | — |
| REM sleep % | 25.1% | 24.7%§ | 24.0%§ | — |
| Awake time (min) | 13.0 | 18.4§ | 18.3§ | — |
†30-day avg based on prior report's computed value; +1 night change from 1.29 AHI shifts this ~0.05 lower.
‡30-day leak avg includes Jul 01 (6.22 L/min mask-failure outlier); cleaned ~0.85–0.88 L/min.
§Sleep-stage averages cover matched nights with both Apple Watch and CPAP data.
| Week | AHI avg | RERA avg | Leak avg | n |
|---|---|---|---|---|
| 06-22 to 06-28 | 2.84 | ~0.86 | 1.98 | 7 |
| 06-29 to 07-05 | 3.24 | ~1.29 | 1.41 | 7 |
| 07-06 to 07-12 | 3.00 | ~1.14 | 0.43 | 7 |
| 07-13 to 07-19 | 2.22 | 2.00 | 0.42 | 7 |
| 07-16 to 07-22 (prior trailing 7d) | 1.62 | 0.86 | 0.55 | 7 |
| 07-17 to 07-23 (current trailing 7d) | 1.59 | — | 0.60 | 7 |
AHI continues declining (1.59 is a new trailing-7-day low). Leak avg ticked up slightly week-over-week (0.55 → 0.60) due to the 07-21/07-22 elevated nights, but tonight's 0.48 will pull future rolling averages back down if the trend holds. Pressure avg is declining steadily (8.49 → 8.10 → 8.00 → 7.88 tonight), consistent with the machine dialing back as respiratory events decrease — a positive efficiency signal.
Primary watch item: 07-24 leak 90th percentile. The avg resolved (0.48 tonight) but the 90th percentile has held at 2.4 L/min for two nights in a row. If 07-24 shows 90th pct ≥ 2.0, a mask cushion inspection is still warranted (check for wear, deformation, or positional shift). If 07-24 shows 90th pct ≤ 1.2, the seal appears to have self-corrected and the 07-21–07-22 streak can be treated as a transient episode.
Deep sleep: Tonight's 25.5% is excellent but unusual. With 07-21 (28.4%) and 07-23 (25.5%) as the two highest in the dataset, and a flat or declining pattern on adjacent nights (07-20: 8.3%, 07-22: 12.0%), the high-deep nights appear intermittent rather than sustained. No action needed, but expect reversion toward 12–16% baseline on 07-24.
AHI outlook: At 1.29 tonight, AHI is at its lowest point since tracking began. Trailing 7-day 1.59 is also a new low. Unless a mask leak disrupts therapy delivery, continued low AHI is the expected baseline.
OSCAR_Greg_by_Day_2026-07-18_2026-07-19.csv file.