Sources: health-report-2026-06-12-to-2026-07-13.json (Apple Watch sleep stages, exported 08:28 on 07-13) + OSCAR_Greg_by_Day_2026-07-12.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (22:38 on 07-12).
Deep sleep suppressed for 4 consecutive nights (July 9–12): avg 13.2% vs 30-day avg 17.3%. This is the longest sustained stretch of below-average deep sleep in the dataset. Nightly deep %: 10.6% → 15.2% → 14.3% → 12.6% (tonight). Prior to this run (July 5–8), deep averaged 23.2%. The stretch spans nights with different CPAP profiles: high-leak (July 9), elevated-AHI (July 10–11), and tonight's mix of RERA elevation and borderline leak — suggesting the suppression is no longer attributable to a single nightly factor.
Week 07-06–07-12 completes: AHI avg 3.00 — four consecutive complete weeks at 3–4× baseline. The weekly AHI progression is now: 0.76 → 2.84 → 3.24 → 3.00. The pattern has plateaued at an elevated level rather than resolving. The partial-week average has not dropped below 2.5 on any individual night since July 3 (AHI 1.10).
RERA=3 tonight — one of the highest RERA counts in the dataset (only July 3 was higher at RERA=4). RDI (3.12) exceeds AHI (2.70) by 0.42/hr, indicating flow limitation events beyond counted apneas/hypopneas. This is the second night in three with RERA ≥ 2 (July 10: RERA=2, July 12: RERA=3). Sustained RERA elevation alongside high pressure (P_Avg 9.07, 5th-highest in dataset) may indicate the device is managing — but not fully resolving — residual flow limitation.
| Metric | Value |
|---|---|
| Bedtime (session start) | 22:38 |
| Time in bed | 6.84 h (6h 51m) |
| Total sleep duration | 6.57 h (6h 34m) |
| Sleep efficiency (TST/TIB) | 96.1% |
| Awake time | 16.1 min |
| Core sleep | 4.13 h — 62.8% |
| Deep sleep | 0.83 h — 12.6% |
| REM sleep | 1.61 h — 24.6% |
| CPAP usage | 7.05 h |
| AHI | 2.70 |
| RDI | 3.12 |
| OA / H / CA / UA / RERA | 13 / 6 / 0 / 0 / 3 |
| Pressure avg | 9.07 cmH₂O |
| Pressure 95th %ile | 11.39 cmH₂O |
| Leak avg | 0.68 L/min |
| Leak 95th %ile | 3.6 L/min |
Computed across all 22 matched nights (06-17 through 07-12).
| Relationship | the user r | Direction |
|---|---|---|
| AHI vs. awake time | +0.44 | Moderate positive — higher event burden → more fragmentation |
| Leak vs. deep sleep % | −0.44 | Moderate negative — higher leak → less deep sleep |
| AHI vs. deep sleep % | −0.10 | Weak — AHI alone is a poor predictor of deep sleep |
| Leak vs. awake time | +0.11 | Weak |
High-leak vs. low-leak nights (threshold: Leak_Avg ≥ 1.0 L/min; excludes tonight):
| Condition | n | Deep sleep avg | Awake avg |
|---|---|---|---|
| Low leak (< 1.0 L/min) | 14 | 19.9% | 16.2 min |
| High leak (≥ 1.0 L/min) | 7 | 11.9% | 19.1 min |
High-leak nights average 8.0 percentage points less deep sleep than low-leak nights. However, the current 4-night run of deep suppression includes only one genuinely high-leak night (July 9: Leak 1.57), with July 10–12 running at moderate-to-low leak (0.18, 0.15, 0.68). This suggests the sustained deep sleep deficit is not currently being driven by leak — making AHI and RERA the more likely residual contributors.
| Metric | Tonight (07-12) | 7-day avg (07-05–07-11) | 30-day avg (06-15–07-11) |
|---|---|---|---|
| AHI | 2.70 | 3.04 | 2.52 |
| RDI | 3.12 | — | — |
| Leak avg (L/min) | 0.68 | 0.45 | 1.00 |
| Pressure avg (cmH₂O) | 9.07 | 8.41 | 8.57* |
| Pressure 95th (cmH₂O) | 11.39 | 10.91 | — |
| Usage hours | 7.05 | 6.70 | 6.34 |
| Deep sleep % | 12.6% | 18.9% | 17.3% |
| REM sleep % | 24.6% | 25.3% | 23.0% |
| Awake time (min) | 16.1 | 18.4 | 17.2 |
*30-day pressure avg excludes the 7 early nights with zero reported pressure.
Week-over-week AHI (complete weeks):
| Week | AHI avg | n | vs. baseline |
|---|---|---|---|
| 06-15–06-21 (baseline) | 0.76 | 6 | — |
| 06-22–06-28 | 2.84 | 7 | +3.7× |
| 06-29–07-05 | 3.24 | 7 | +4.3× |
| 07-06–07-12 | 3.00 | 7 | +3.9× |
4-night deep sleep trend (July 9–12):
| Date | Deep % | AHI | Leak (L/min) | RERA |
|---|---|---|---|---|
| 07-09 | 10.6% | 2.12 | 1.57 | 0 |
| 07-10 | 15.2% | 2.98 | 0.18 | 2 |
| 07-11 | 14.3% | 4.66 | 0.15 | 0 |
| 07-12 | 12.6% | 2.70 | 0.68 | 3 |
| 4-night avg | 13.2% | 3.12 | 0.65 | 1.3 |
vs. prior 4 nights (July 5–8): deep avg 23.2%, AHI avg 2.62, leak avg 0.31.