| Metric | Value |
|---|---|
| CPAP usage hours | 6.38 |
| Session count | 1 |
| AHI | 1.41 |
| RDI | 1.57 |
| Obstructive apneas (OA) | 6 |
| Hypopneas (H) | 3 |
| Central apneas (CA) | 0 |
| Unclassified apneas (UA) | 0 |
| RERA | 1 |
| Pressure_Avg | 7.74 |
| Pressure_Min | 4.00 |
| Pressure_Max | 11.66 |
| Pressure_90th | 10.08 |
| Leak_Avg | 1.05 |
| Leak_Max | 18.00 |
| Leak_90th | 4.80 |
| FL_Avg | 0.0162 |
| FL_P95 | 0.10 |
| FL_Max | 0.40 |
| Min_Above_005 (min) | 40.0 |
| Min_Above_010 (min) | 18.2 |
| Min_Above_020 (min) | 3.9 |
| Frac_NonZero (FL samples) | 25.41% |
| Apple Watch time in bed (min) | 372.8 |
| Apple Watch total sleep (min) | 365.8 |
| Apple Watch awake (min) | 7.0 |
| Apple Watch deep sleep (min / %) | 42.6 / 11.66% |
| Apple Watch REM sleep (min / %) | 83.8 / 22.91% |
| Apple Watch core sleep (min / %) | 239.3 / 65.43% |
| Sleep efficiency (TSD/TIB) | 98.1% |
Trailing windows exclude tonight by construction (they cover the 7 and 30 nights ending 2026-09-26).
| Metric | Tonight | 7d avg | 30d avg | Ξ vs 7d | Ξ vs 30d | 30d z |
|---|---|---|---|---|---|---|
| AHI | 1.41 | 2.34 | 2.21 | -39.7% | -36.3% | -1.24 |
| OA count | 6.00 | 8.57 | 10.20 | -30.0% | -41.2% | -1.20 |
| H count | 3.00 | 5.57 | 3.13 | -46.2% | -4.3% | -0.06 |
| CA count | 0.00 | 0.43 | 0.87 | -100.0% | -100.0% | -0.81 |
| RERA count | 1.00 | 0.71 | 0.70 | +40.0% | +42.9% | 0.34 |
| Pressure_Avg | 7.74 | 7.77 | 7.48 | -0.3% | +3.5% | 0.55 |
| Pressure_90th | 10.08 | 10.38 | 10.01 | -2.9% | +0.7% | 0.13 |
| Leak_Avg | 1.05 | 1.53 | 0.88 | -31.6% | +18.9% | 0.25 |
| Leak_Max | 18.00 | 25.54 | 18.80 | -29.5% | -4.3% | -0.11 |
| Leak_90th | 4.80 | 5.14 | 2.72 | -6.7% | +76.5% | 0.68 |
| Usage hours | 6.38 | 6.23 | 6.42 | +2.5% | -0.7% | -0.11 |
| FL_P95 | 0.10 | 0.10 | 0.09 | -2.8% | +6.0% | 0.27 |
| Min_Above_010 | 18.20 | 18.49 | 16.89 | -1.5% | +7.7% | 0.24 |
| Min_Above_020 | 3.90 | 3.99 | 3.79 | -2.2% | +2.8% | 0.06 |
| Metric | Recent 7d | Prior 7d | Ξ | Ξ % |
|---|---|---|---|---|
| AHI | 2.229 | 2.289 | -0.060 | -2.6% |
| OA | 8.429 | 10.857 | -2.429 | -22.4% |
| H | 5.000 | 2.857 | +2.143 | +75.0% |
| CA | 0.429 | 1.143 | -0.714 | -62.5% |
| Pressure_Avg | 7.699 | 7.491 | +0.207 | +2.8% |
| Pressure_90th | 10.314 | 9.846 | +0.469 | +4.8% |
| Leak_Avg | 1.420 | 0.664 | +0.756 | +113.8% |
| Leak_90 | 4.971 | 2.229 | +2.743 | +123.1% |
| Leak_Max | 24.171 | 15.943 | +8.229 | +51.6% |
| Usage hours | 6.221 | 6.503 | -0.281 | -4.3% |
| FL_P95 | 0.099 | 0.099 | +0.000 | +0.0% |
| Min_Above_010 | 17.000 | 17.757 | -0.757 | -4.3% |
| Min_Above_020 | 3.543 | 4.157 | -0.614 | -14.8% |
| Date | AHI | OA | H | CA | PAvg | P90 | LAvg | LMax | L90 | FL_P95 | MinAbv010 | MinAbv020 | Hours |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-18 | 0.87 | 5 | 1 | 0 | 7.07 | 9.56 | 0.18 | 8.40 | 0.00 | 0.09 | 16.4 | 2.9 | 6.87 |
| 2026-09-19 | 3.23 | 15 | 5 | 0 | 7.60 | 9.64 | 0.41 | 14.40 | 1.20 | 0.10 | 16.8 | 2.1 | 6.18 |
| 2026-09-20 | 2.18 | 7 | 7 | 0 | 8.21 | 10.54 | 1.85 | 27.60 | 6.00 | 0.13 | 28.6 | 7.0 | 6.42 |
| 2026-09-21 | 1.94 | 5 | 6 | 1 | 7.82 | 10.46 | 0.90 | 14.40 | 1.20 | 0.09 | 16.2 | 2.9 | 6.20 |
| 2026-09-22 | 3.20 | 12 | 7 | 0 | 7.49 | 10.32 | 1.03 | 36.00 | 2.40 | 0.10 | 14.8 | 3.1 | 5.93 |
| 2026-09-23 | 1.94 | 9 | 3 | 0 | 7.78 | 10.06 | 2.87 | 26.40 | 12.00 | 0.10 | 17.4 | 3.3 | 6.18 |
| 2026-09-24 | 1.65 | 3 | 6 | 1 | 7.36 | 10.18 | 0.59 | 28.80 | 1.20 | 0.09 | 15.2 | 3.4 | 6.05 |
| 2026-09-25 | 2.74 | 11 | 4 | 1 | 8.04 | 10.60 | 1.13 | 22.80 | 3.60 | 0.11 | 18.0 | 3.1 | 5.83 |
| 2026-09-26 | 2.72 | 13 | 6 | 0 | 7.66 | 10.50 | 2.37 | 22.80 | 9.60 | 0.10 | 19.2 | 5.1 | 6.98 |
| 2026-09-27 | 1.41 | 6 | 3 | 0 | 7.74 | 10.08 | 1.05 | 18.00 | 4.80 | 0.10 | 18.2 | 3.9 | 6.38 |
Based on 66 matched (CPAP + Apple Watch sleep-stage) nights through 2026-09-27.
| Pair | the user r | Interpretation |
|---|---|---|
| AHI vs deep_pct | -0.140 | weak negative |
| AHI vs awake_min | -0.170 | weak negative |
| OA vs awake_min | -0.044 | negligible negative |
| Leak_Avg vs deep_pct | -0.029 | negligible negative |
| Leak_90th vs deep_pct | -0.051 | negligible negative |
| Leak_Max vs awake_min | -0.163 | weak negative |
| FL_P95 vs awake_min | 0.153 | weak positive |
| Min_Above_010 vs deep_pct | -0.173 | weak negative |
Leak_90 median split (median = 2.40): - Low-leak nights (n=44): mean deep% 14.18, awake 14.16 min - High-leak nights (n=22): mean deep% 12.79, awake 11.20 min
Tonight is a clean, broad-based improvement from last night across every metric that was flagged. AHI dropped nearly in half (1.41 vs 2.72), both leak measures fell by half or more (Leak_Avg 1.05 vs 2.37, Leak_90 4.8 vs 9.60), and OA count halved (6 vs 13). Hypopneas also halved (3 vs 6). Usage was strong at 6.38 h, continuing the recovery from the sub-6 h stretch earlier in the week.
That said, the leak picture is still worth watching. One good night doesn't reset a two-week trend: the recent-7d vs prior-7d comparison still shows Leak_Avg +114% / Leak_90 +123%, because the baseline shift that began ~2026-09-20 still dominates the 7-day window. Tomorrow's reading will tell whether 2026-09-27 was a true reset or a one-night dip in an otherwise elevated run. Mechanistic read on the lower leak: the Leak_Max of 18.0 is well below yesterday's 22.80, which is consistent with either (a) a cushion that re-seated during sleep or (b) a position/orientation that didn't stress the mask seal. Nothing clinically concerning.
The first matched sleep-stage data point for last night's high-leak session is now in. The 2026-09-26 Apple Watch session recorded TIB 446.6 min, deep% 12.85, awake 13.05 min β all firmly within normal range for the user. That's a useful data point: it means the elevated leak on 2026-09-26 did NOT noticeably suppress deep sleep or increase arousal, which reinforces the correlation finding (leak and sleep-stage are weakly or not at all related in this dataset). As a result, the leak elevation is cosmetic/data-level rather than functional, as long as it doesn't climb much higher.
Pressure_90th 10.08 is near the 30d mean β the auto-titrator eased slightly off yesterday's level, consistent with the lower event load. No actionable concerns tonight.