Sources: health-report-2026-06-11-to-2026-07-12.json (Apple Watch sleep stages, exported 12:35 on 07-12) + OSCAR_Greg_by_Day_2026-07-11.csv (ResMed AirSense/AirFlow 11 via OSCAR). Matched by calendar date of sleep-session start (22:52 on 07-11).
AHI 4.66 — highest since July 1, now a full month of sustained elevation. Week-over-week AHI: 06-15–06-21 → 0.76, 06-22–06-28 → 2.84, 06-29–07-05 → 3.24, 07-06–07-12 → 3.06 (6 nights). AHI has been running 3–4× above baseline for four consecutive weeks and shows no sign of returning to the June 15–21 baseline. Tonight's 4.66 is the 5th highest single-night AHI in the dataset (behind 06-25: 5.74, 06-29: 5.56, 07-01: 4.84, 06-30: 4.70) and the highest since July 1.
Obstructive burden: OA=21, H=8 — highest OA count since early July, highest H count since June 30 (H=13). Pressure responded by reaching a 95th %ile of 11.66 cmH₂O (up from 11.42 last night, the prior recent high). Four of the last five nights have had P95 ≥ 10.9. The device is working at its upper range on high-event nights, which may limit headroom. Leak was excellent (0.15 L/min) and is not a factor tonight.
Deep sleep 14.3% — below both the 7-day average (20.3%) and 30-day average (17.4%). Combined with awake time of 24.6 min (vs 7-day avg 16.3 min), this is a third night in four with >24 min awake. The correlation across 21 matched nights between AHI and awake time is r = +0.44, consistent with tonight's pattern — elevated event burden driving fragmentation rather than leak. Deep sleep was also suppressed on the two previous high-AHI nights (06-29: 24.5% was the exception, but 06-30, 07-01, and tonight cluster at 14–16% deep with elevated AHI).
| Metric | Value |
|---|---|
| Bedtime (session start) | 22:52 |
| Time in bed | 7.09 h (7h 6m) |
| Total sleep duration | 6.68 h (6h 41m) |
| Sleep efficiency (TST/TIB) | 94.2% |
| Awake time | 24.6 min |
| Core sleep | 3.95 h — 59.1% |
| Deep sleep | 0.95 h — 14.3% |
| REM sleep | 1.78 h — 26.7% |
| CPAP usage | 6.65 h |
| AHI | 4.66 |
| RDI | 4.66 |
| OA / H / CA / UA / RERA | 21 / 8 / 2 / 0 / 0 |
| Pressure avg | 9.59 cmH₂O |
| Pressure 95th %ile | 11.66 cmH₂O |
| Leak avg | 0.15 L/min |
| Leak 95th %ile | 0 L/min |
Computed across all 21 matched nights (06-17 through 07-11) where both CPAP and Apple Watch stage data are available.
| Relationship | the user r | Direction |
|---|---|---|
| AHI vs. awake time | +0.44 | Moderate positive — higher event burden → more fragmentation |
| Leak vs. deep sleep % | −0.46 | Moderate negative — higher leak → less deep sleep |
| AHI vs. deep sleep % | −0.11 | Weak — AHI alone is a poor predictor of deep sleep suppression |
| Leak vs. awake time | +0.10 | Weak |
High-leak vs. low-leak nights (threshold: Leak_Avg ≥ 1.0 L/min):
| Condition | n | Deep sleep avg | Awake avg |
|---|---|---|---|
| Low leak (< 1.0 L/min) | 13 | 20.4% | 15.6 min |
| High leak (≥ 1.0 L/min) | 7 | 11.9% | 19.1 min |
Leak is the stronger predictor of reduced deep sleep (−8.5 pp difference), while AHI is the stronger predictor of increased fragmentation/awake time. Tonight's pattern (low leak, elevated AHI, below-avg deep sleep, above-avg awake time) is consistent with these relationships.
| Metric | Tonight (07-11) | 7-day avg (07-04–07-10) | 30-day avg (06-15–07-10) |
|---|---|---|---|
| AHI | 4.66 | 2.64 | 2.43 |
| Leak avg (L/min) | 0.15 | 0.44 | 1.04 |
| Pressure avg (cmH₂O) | 9.59 | 8.20 | 8.51* |
| Pressure 95th (cmH₂O) | 11.66 | 10.70 | — |
| Usage hours | 6.65 | 6.59 | 6.33 |
| Deep sleep % | 14.3% | 20.3% | 17.4% |
| REM sleep % | 26.7% | 24.7% | 22.8% |
| Awake time (min) | 24.6 | 16.3 | 16.8 |
*30-day pressure avg excludes the 7 early nights with zero reported pressure (unreliable zeroes in initial OSCAR data).
Week-over-week AHI: | Week | AHI avg | vs. baseline | |---|---|---| | 06-15–06-21 (baseline) | 0.76 | — | | 06-22–06-28 | 2.84 | +3.7× | | 06-29–07-05 | 3.24 | +4.3× | | 07-06–07-12 (6 nights) | 3.06 | +4.0× |