🔴 Flow-limitation at a 26-night peak across three metrics simultaneously — FL_P95, Min_Above_010, and Min_Above_020 all rank 26/26. FL_P95 0.14 (z = +2.24 vs 30d, +46.4%), Min_Above_010 32.0 min (z = +2.89, +86.4%), Min_Above_020 9.8 min (z = +2.71, +129.4%); FL_Avg 0.0217 (z = +1.68, rank 23/26) and Min_Above_005 60.5 min (z = +2.08, rank 25/26) also hit the top of the window. This is the highest central FL (FL_P95) AND the highest FL tails (Min_Above_010/020) in the 26-night window — not the "duality" of 10-09 (low central, high tails), but a full-spectrum FL spike. Interestingly FL_Max 0.42 is unremarkable (z = -0.59) — the brief 1-sample peaks were normal; it's the sustained flow-limitation that was extreme. 7d FL_P95 avg jumped to 0.104 (+17.7% WoW vs prior 7d 0.089); 7d Min_Above_020 2.3× the prior 7d (6.41 vs 2.77, +131.4% WoW). Three of the last four nights have Min_Above_020 ≥ 4.6; this is now a sustained FL trend, not a cluster.
🔴 Sleep architecture decoupled from a near-perfect sleep window — REM 18.96% (rank 3/26) and deep 10.27% (rank 7/26) despite TIB 6h59.5m, 99.04% efficiency, and awake only 4.01 min. REM 78.78 min / 18.96% (z = -1.39 vs 30d, -21.0%); only 09-29 (15.99%) and 09-30 (18.32%) in the 26-night window had less REM. Deep 42.65 min / 10.27% (z = -0.88, -23.9%). Core 294.04 min / 70.77% — rank 26/26, the highest core-% night in the window (z = +2.26). The night was long and quiet (sleep start 22:38 PM — the earliest since 2026-09-26; TIB rank 23/26; awake rank 4/26 from the bottom), so last night's "short/late = REM drop" explanation does not apply tonight. Tonight the sleep window was ideal; what degraded was the quality of the sleep inside it — architecture was shunted into N1/N2 at the expense of both N3 and REM. The simplest driver is flag 1: sustained subthreshold flow-limitation that fragments architecture without scoring as events or triggering arousals.
🟡 Deep + REM soft-patch now extends to a 3-night cluster (10-08 deep 9.40, 10-09 REM 20.09, 10-10 deep 10.27 + REM 18.96) — the first stretch like this in the 26-night window. 7d deep% 12.54 is -12.5% vs prior 7d (14.33); 7d REM% 23.86 is flat (+0.8%) because 10-04/10-06 kept the average up. But the recent three-night slice (10-08–10-10) averages deep 11.23% and REM 21.11% vs the 26-night means of 13.51 and 24.13 — both ~2 points below baseline simultaneously, which is unusual. Yesterday's note that "architecture tonight is not well explained by leak metrics" extends tonight into "architecture is not well explained by anything except FL" — FL metrics tonight hit the window ceiling, and architecture responded accordingly.
🟢 Leak_Max streak flagged yesterday is BROKEN — Leak_Max 18.0 L/min tonight is the lowest since 2026-10-01 (streak was 8 nights ≥ 22.8). Pattern (10-02 → 10-10): 25.2, 22.8, 28.8, 22.8, 30.0, 34.8, 30.0, 24.0, 18.0. Tonight is -11.5% vs the 30d mean of 21.52 — flat average for the window, no longer elevated. Leak_90th 4.80 (z = +0.35) is above the 30d mean 3.68 but matches yesterday exactly; Leak_Avg 1.10 is near 30d median (z = -0.05). The ≥ 22.8 streak flagged for 8 consecutive nights is clearly over for now — one night doesn't rule out mask fit as a longer-term issue, but it does mean the pattern is not fully sustained. Whatever the user (or circumstances) changed last night, the seal held tonight.
🟢 CPAP metrics across the board are clean — AHI 1.26 is the 5th consecutive sub-2.0 AHI night, and OA count 5 is rank 3/26 in the window. AHI post-10-05 breakthrough: 1.85 → 1.24 → 0.85 → 1.49 → 1.26 (mean 1.34). OA 5 (z = -1.01, rank 3/26 — among the three lowest OA counts in the window). CA back to 0 (ending yesterday's one-off CA = 1). RERA back to 1 (down from 5 yesterday — the RERA cluster flagged yesterday has already attenuated). The AHI-RDI gap tonight is only 0.14 (vs 0.83 yesterday) — one of the smallest of the last 10 nights; events tonight are overwhelmingly scoring as apneas/hypopneas rather than RERAs, which is the normal pattern. 7d AHI 1.87 remains distorted by the 10-05 outlier.
🟡 Pressure_90th 10.60 is rank 22/26 (z = +0.68) — the auto-titrator is pushing moderately higher than typical, consistent with the FL spike. Pressure_Avg 7.38 is flat (z = -0.39), but P90 10.60 is 4.5% above the 30d mean. Pressure_Max 12.56 is also elevated. The pattern — flat avg, elevated 90th and max — says the machine is responding to the sustained FL by raising pressure during the restricted periods but not uniformly. FL_Max 0.42 being low suggests the pressure response is working to blunt the FL peaks even though the sustained FL (the Min_Above_* channels) is at a window high. This is auto-titration doing its job but not fully resolving the underlying restriction.
🟢 Usage 7.17h is rank 25/26 (z = +1.71) — second-longest CPAP night in the window after 2026-10-08's 7.08h, and the longest since mid-September. 7d usage 6.59h is +6.9% vs 7d, +11.6% vs 30d. The last four nights have averaged 6.68h vs the 30d mean of 6.43 — a mini recovery from the mid-September lower-use stretch. TIB 419.49 min matches usage closely (two-session mornings didn't happen; one CPAP session covered the whole TIB).
| Metric | Value |
|---|---|
| Sleep start | 2026-10-10T22:38:55-05:00 |
| Time in bed | 419.49 min (6h 59.5m) |
| Total sleep | 415.47 min (6h 55.5m) |
| Sleep efficiency | 99.04% |
| Awake time | 4.01 min |
| Core (N1+N2) sleep | 294.04 min / 70.77% |
| Deep (N3) sleep | 42.65 min / 10.27% |
| REM | 78.78 min / 18.96% |
| CPAP usage hours | 7.17 |
| Session count | 1 |
| AHI | 1.26 |
| RDI | 1.40 |
| Obstructive apneas (OA) | 5 |
| Hypopneas (H) | 4 |
| Central apneas (CA) | 0 |
| Unclassified apneas (UA) | 0 |
| RERA | 1 |
| Pressure_Avg | 7.38 |
| Pressure_Min | 4.00 |
| Pressure_Max | 12.56 |
| Pressure_90th | 10.60 |
| Leak_Avg | 1.10 |
| Leak_Max | 18.00 |
| Leak_90th | 4.80 |
| FL_Avg | 0.0217 |
| FL_P95 | 0.14 |
| FL_Max | 0.42 |
| Min_Above_005 (min) | 60.5 |
| Min_Above_010 (min) | 32.0 |
| Min_Above_020 (min) | 9.8 |
| Frac_NonZero (FL samples) | 26.08% |
| Metric | Tonight | 7d avg | 30d avg | Δ vs 7d | Δ vs 30d |
|---|---|---|---|---|---|
| AHI | 1.26 | 1.87 | 2.02 | -32.5% | -37.7% |
| RDI | 1.40 | 2.22 | 2.19 | -37.0% | -36.1% |
| OA count | 5.00 | 8.43 | 9.03 | -40.7% | -44.6% |
| H count | 4.00 | 3.43 | 3.30 | +16.7% | +21.2% |
| CA count | 0.00 | 0.14 | 0.53 | -100.0% | -100.0% |
| RERA count | 1.00 | 2.29 | 1.07 | -56.3% | -6.3% |
| Pressure_Avg | 7.38 | 7.48 | 7.55 | -1.3% | -2.2% |
| Pressure_90 | 10.60 | 10.45 | 10.15 | +1.4% | +4.4% |
| Leak_Avg | 1.10 | 1.46 | 1.13 | -24.7% | -2.9% |
| Leak_Max | 18.00 | 26.91 | 22.24 | -33.1% | -19.1% |
| Leak_90th | 4.80 | 4.29 | 3.68 | +12.0% | +30.4% |
| Usage hours | 7.17 | 6.59 | 6.43 | +8.7% | +11.6% |
| FL_P95 | 0.140 | 0.104 | 0.096 | +34.2% | +46.4% |
| FL_Avg | 0.0217 | 0.0176 | 0.0158 | +23.4% | +37.4% |
| FL_Max | 0.420 | 0.524 | 0.481 | -19.9% | -12.6% |
| Min_Above_005 | 60.5 | 42.96 | 38.72 | +40.8% | +56.3% |
| Min_Above_010 | 32.0 | 20.46 | 17.17 | +56.4% | +86.4% |
| Min_Above_020 | 9.8 | 6.41 | 4.27 | +52.8% | +129.4% |
| Frac_NonZero | 0.261 | 0.254 | 0.249 | +2.7% | +4.7% |
| Deep % | 10.27 | 12.54 | 13.48 | -18.2% | -23.9% |
| REM % | 18.96 | 23.86 | 23.98 | -20.5% | -21.0% |
| Core % | 70.77 | — | — | — | — |
| Awake min | 4.01 | 6.16 | 9.68 | -34.8% | -58.6% |
| TIB min | 419.49 | 390.03 | 380.54 | +7.6% | +10.2% |
| Total sleep min | 415.47 | 383.86 | 370.85 | +8.2% | +12.0% |
| Sleep efficiency | 99.04 | 98.39 | 97.45 | +0.7% | +1.6% |
| Metric | Recent 7d | Prior 7d | Δ | Δ % |
|---|---|---|---|---|
| AHI | 1.867 | 1.494 | +0.373 | +25.0% |
| RDI | 2.224 | 1.633 | +0.591 | +36.2% |
| OA | 8.429 | 6.857 | +1.571 | +22.9% |
| H | 3.429 | 2.286 | +1.143 | +50.0% |
| CA | 0.143 | 0.286 | -0.143 | -50.0% |
| RERA | 2.286 | 0.857 | +1.429 | +166.7% |
| Pressure_Avg | 7.480 | 7.703 | -0.223 | -2.9% |
| Pressure_90 | 10.454 | 10.114 | +0.340 | +3.4% |
| Leak_Avg | 1.461 | 1.241 | +0.220 | +17.7% |
| Leak_90 | 4.286 | 4.800 | -0.514 | -10.7% |
| Leak_Max | 26.914 | 22.800 | +4.114 | +18.0% |
| Usage hours | 6.594 | 6.404 | +0.190 | +3.0% |
| Deep % (Apple) | 12.544 | 14.330 | -1.786 | -12.5% |
| REM % (Apple) | 23.857 | 23.656 | +0.201 | +0.8% |
| Awake min (Apple) | 6.165 | 13.691 | -7.527 | -55.0% |
| Sleep min (Apple) | 383.862 | 364.655 | +19.207 | +5.3% |
| TIB min (Apple) | 390.026 | 378.346 | +11.680 | +3.1% |
| Sleep efficiency | 98.39 | 96.35 | +2.04 | +2.1% |
| FL_P95 | 0.104 | 0.089 | +0.016 | +17.7% |
| FL_Avg | 0.0176 | 0.0150 | +0.0026 | +17.5% |
| Min_Above_010 | 20.457 | 15.143 | +5.314 | +35.1% |
| Min_Above_020 | 6.414 | 2.771 | +3.643 | +131.4% |
| Date | AHI | OA | CA | RERA | PAvg | P90 | LAvg | LMax | L90 | FL_P95 | MinAbv010 | MinAbv020 | Deep% | REM% | Awake |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-01 | 0.56 | 4 | 0 | 0 | 6.82 | 9.00 | 0.53 | 8.4 | 2.4 | 0.07 | 10.9 | 2.2 | 16.96 | 22.96 | 16.56 |
| 2026-10-02 | 2.04 | 9 | 1 | 2 | 8.50 | 10.32 | 1.68 | 25.2 | 8.4 | 0.09 | 15.9 | 2.8 | 18.86 | 34.36 | 8.53 |
| 2026-10-03 | 2.33 | 7 | 1 | 2 | 7.21 | 9.30 | 2.77 | 22.8 | 10.8 | 0.08 | 11.3 | 2.5 | 9.63 | 25.46 | 10.54 |
| 2026-10-04 | 1.18 | 6 | 0 | 4 | 7.90 | 10.18 | 1.91 | 28.8 | 4.8 | 0.13 | 25.7 | 7.1 | 7.88 | 27.87 | 1.51 |
| 2026-10-05 | 5.20 | 21 | 0 | 4 | 7.93 | 12.36 | 1.76 | 22.8 | 7.2 | 0.09 | 15.7 | 8.2 | 15.92 | 25.21 | 8.03 |
| 2026-10-06 | 1.85 | 8 | 0 | 1 | 7.19 | 10.24 | 1.04 | 30.0 | 1.2 | 0.08 | 15.1 | 4.6 | 12.12 | 27.14 | 4.01 |
| 2026-10-07 | 1.24 | 7 | 0 | 0 | 7.69 | 10.72 | 1.50 | 34.8 | 3.6 | 0.12 | 23.3 | 4.6 | 18.21 | 23.43 | 6.02 |
| 2026-10-08 | 0.85 | 6 | 0 | 1 | 6.89 | 9.20 | 1.58 | 30.0 | 3.6 | 0.09 | 17.4 | 3.9 | 9.40 | 24.30 | 9.03 |
| 2026-10-09 | 1.49 | 6 | 1 | 5 | 7.38 | 9.88 | 1.34 | 24.0 | 4.8 | 0.08 | 14.0 | 6.7 | 14.02 | 20.09 | 10.54 |
| 2026-10-10 | 1.26 | 5 | 0 | 1 | 7.38 | 10.60 | 1.10 | 18.0 | 4.8 | 0.14 | 32.0 | 9.8 | 10.27 | 18.96 | 4.01 |
Correlations computed across the matched set after excluding pre-2026-06-22 low-confidence CPAP nights.
| Pair | the user r | Interpretation |
|---|---|---|
| AHI vs deep_pct | -0.069 | negligible |
| AHI vs awake_min | -0.135 | weak negative |
| OA vs awake_min | -0.023 | negligible |
| CA vs deep_pct | -0.043 | negligible |
| Leak_Avg vs deep_pct | -0.083 | negligible |
| Leak_90 vs deep_pct | -0.047 | negligible |
| Leak_Max vs awake_min | -0.210 | weak negative |
| FL_P95 vs awake_min | -0.094 | negligible |
| Min_Above_010 vs deep_pct | -0.191 | weak negative |
Bucket comparison (Leak_90 median split, median = 2.40): - Low-leak nights (n=51): mean deep% 14.45, awake 14.12 min - High-leak nights (n=34): mean deep% 13.46, awake 10.18 min - Δ (high – low): deep% -0.99 pp, awake -3.94 min
Tonight's Leak_90 of 4.80 lands in the high-leak bucket (above the 2.40 median); tonight's deep% of 10.27 is well below the high-leak bucket mean (13.46) — not well-explained by leak alone. Note the correlation this report finds most relevant tonight: Min_Above_010 vs deep_pct r = -0.191 — the only correlation with meaningful signal (though still weak); tonight's Min_Above_010 of 32.0 min is the highest in the window and tonight's deep% of 10.27 is well below baseline, so the single-point observation is consistent with that direction. The matched-night correlation set now includes 85 confident nights (one more than yesterday).