🟡 RERA count spikes to 5 — the highest in 26 nights (z = +2.78 vs 30d). Tonight's 5 RERA tops the entire 26-night window; the next-highest values were 4 on 10-04 and 10-05, and the window mean is only 1.03 (30d) / 1.12 (26d). Z-score +2.78 vs 30d, +383.9% vs the 30d mean, rank 26/26. RERAs are respiratory effort-related arousals — subthreshold flow restrictions that fragment sleep without being scored as apneas or hypopneas — so this signal co-occurs with the elevated flow-limitation tails below (Min_Above_020 at 6.7 min, rank 22/26). The AHI-RDI gap tonight (1.49 vs 2.32) is the widest since 10-05, and 36% of the RDI (5 of 14 total scored events) is RERAs — unusually RERA-dominant. 7d RERA avg jumped to 2.43 (vs prior 7d 0.71, +240%) — this trio of 4/4/5 nights (10-04, 10-05, 10-09) is driving the entire 7d spike.
🟡 Leak_Max streak extends to 8 consecutive nights ≥ 22.8 L/min — Leak_Max has not dropped below 22.8 since 2026-10-01. Streak values (10-02 → 10-09): 25.2, 22.8, 28.8, 22.8, 30.0, 34.8, 30.0, 24.0 (mean 27.3). Tonight's 24.0 is the lowest of the streak but still +11.5% vs the 30d mean of 21.52 and above every pre-streak night going back weeks. Yesterday's 7-night flag is now 8 nights — the pattern is sustained, no longer plausibly noise. Mask fit, cushion wear, headgear tension, and sleep position are overdue for inspection. The auto-titrator continues to handle the seal gracefully (Pressure_Avg 7.38 is below both 7d and 30d means, AHI 1.49 is below both too), so this remains a maintenance signal rather than a clinical one — but it is now firmly trend data.
🔴 REM % at 20.09% is rank 3/26 in the window — one of the three lowest REM nights. REM 20.09% / 69.75 min (z = -1.15, -16.4% vs 30d mean of 24.03). Only 09-29 (15.99%) and 09-30 (18.32%) in the 26-night window had less REM. Pre-26-day REM is normally stable for the user (window mean 24.03%, pstdev ~3.4pp), so a 4-point drop is a real deviation. Likely driver: short, late night — TIB 357.76 min (rank 6/26) with sleep start at 00:49 AM on 10-10, which is the latest start in the last 14 nights (next latest was 00:34 on 2026-10-03). Shortened sleep windows truncate the second half of the night, where REM cycles are longest and most concentrated.
🟢 Deep sleep rebounded to 14.02% — back in line with the 30d baseline after yesterday's 9.40% trough. Deep 48.67 min / 14.02% (z = +0.09, +3.7% vs 30d mean of 13.52). Three of the last four nights now have ≥12% deep (10-07 18.21, 10-08 9.40 was the outlier, 10-09 14.02). The deep-% "soft patch" flagged yesterday is softening — WoW deep% is still -15.8% because of the 10-03/10-04/10-06/10-08 cluster, but the trajectory the last two nights is up. The CPAP-vs-architecture decoupling noted yesterday (clean CPAP, poor deep) did not persist: tonight's deep is on-trend despite one of the lowest Frac_NonZero nights in the window.
🟢 AHI 1.49 is the 4th consecutive sub-2.0 night after the 10-05 spike — the recovery trajectory is intact. AHI post-10-05: 1.85 → 1.24 → 0.85 → 1.49 (mean 1.36). 7d AHI 2.02 (-26.2% vs 7d, -27.3% vs 30d) remains inflated by the single 10-05 outlier; drop that night and the 7d avg collapses to 1.49 — essentially identical to tonight's single-night value and well below the 30d mean. OA count 6 (rank 5/26, z = -0.72, -34.8% vs 30d); H 2 (z = -0.53); CA 1 (z = +0.50, within normal range). The 10-05 breakthrough is now surrounded by six consecutive sub-2.0 AHI nights (10-03 2.33 and 10-04 1.18 before; 10-06 through 10-09 after) — confidence that it was a one-off is complete.
🟡 Flow-limitation duality — central distribution low but tails elevated. FL_P95 0.08 (rank 4/26, z = -0.95 — one of the lowest central-FL nights in the window); Min_Above_010 14.0 min (rank 6/26, z = -0.70, -14.8% vs 30d); FL_Avg 0.0143 (z = -0.52); Frac_NonZero 20.55% (rank 5/26, z = -0.99) — all low. But Min_Above_020 6.70 min (rank 22/26, z = +1.55, +67.8% vs 30d mean of 3.99) is markedly elevated. FL_Max 0.51 is near the 7d median. Interpretation: most of the night the airway was quiet, but there were brief, intense FL moments pushing minutes above the 0.20 threshold. This matches the RERA cluster (flag 1) — short, strong FL events that trigger arousals without scoring as apneas. First time in the window Min_Above_020 ≥ 6 outside of 10-04/10-05 (which were 7.1 and 8.2).
🟡 Short, late night — CPAP usage 6.03h, TIB 357.76 min, sleep start 00:49 AM. Usage rank 5/26 (z = -0.85), TIB rank 6/26 (z = -0.80), TSD rank 7/26 (z = -0.85). First under-6.5h usage night since 2026-09-28 (6.48h). Sleep start 00:49 AM on 10-10 is 2h35m later than yesterday's 22:14, and later than any of the previous 13 nights. Sleep efficiency 97.05% is still high — the sleep that happened was compact — but the shortened window truncated REM (flag 3) and the late start may be the simpler explanation for the REM drop. Nothing suggests a CPAP-side cause.
🟡 CA count returned to 1 after a 5-night zero-CA streak (10-04 → 10-08). CA 1 tonight (z = +0.50), ending the longest zero-CA run since the 6-night streak 09-26 → 10-01. Still within normal range — single CA events happen occasionally — not treating as a trend yet; worth noting because 10-02 and 10-03 also had CA=1 before the streak, so this is the fourth CA in the last 8 nights after six straight zeros.
| Metric | Value |
|---|---|
| Sleep start | 2026-10-10T00:49:14-05:00 |
| Time in bed | 357.76 min (5h 57.8m) |
| Total sleep | 347.23 min (5h 47.2m) |
| Sleep efficiency | 97.05% |
| Awake time | 10.54 min |
| Core (N1+N2) sleep | 228.81 min / 65.90% |
| Deep (N3) sleep | 48.67 min / 14.02% |
| REM | 69.75 min / 20.09% |
| CPAP usage hours | 6.03 |
| Session count | 1 |
| AHI | 1.49 |
| RDI | 2.32 |
| Obstructive apneas (OA) | 6 |
| Hypopneas (H) | 2 |
| Central apneas (CA) | 1 |
| Unclassified apneas (UA) | 0 |
| RERA | 5 |
| Pressure_Avg | 7.38 |
| Pressure_Min | 4.00 |
| Pressure_Max | 11.82 |
| Pressure_90th | 9.88 |
| Leak_Avg | 1.34 |
| Leak_Max | 24.00 |
| Leak_90th | 4.80 |
| FL_Avg | 0.0143 |
| FL_P95 | 0.08 |
| FL_Max | 0.51 |
| Min_Above_005 (min) | 30.3 |
| Min_Above_010 (min) | 14.0 |
| Min_Above_020 (min) | 6.7 |
| Frac_NonZero (FL samples) | 20.55% |
| Metric | Tonight | 7d avg | 30d avg | Δ vs 7d | Δ vs 30d |
|---|---|---|---|---|---|
| AHI | 1.49 | 2.02 | 2.05 | -26.2% | -27.3% |
| OA count | 6.00 | 8.71 | 9.20 | -31.1% | -34.8% |
| H count | 2.00 | 3.71 | 3.17 | -46.2% | -36.8% |
| CA count | 1.00 | 0.29 | 0.63 | +250.0% | +57.9% |
| RERA count | 5.00 | 2.43 | 1.03 | +105.9% | +383.9% |
| Pressure_Avg | 7.38 | 7.46 | 7.54 | -1.0% | -2.1% |
| Pressure_90 | 9.88 | 10.27 | 10.11 | -3.8% | -2.3% |
| Leak_Avg | 1.34 | 1.70 | 1.10 | -21.2% | +21.7% |
| Leak_Max | 24.00 | 27.60 | 21.88 | -13.0% | +9.7% |
| Leak_90th | 4.80 | 5.14 | 3.52 | -6.7% | +36.4% |
| Usage hours | 6.03 | 6.43 | 6.39 | -6.2% | -5.7% |
| FL_P95 | 0.080 | 0.096 | 0.093 | -16.4% | -14.3% |
| Min_Above_010 | 14.00 | 17.50 | 16.42 | -20.0% | -14.8% |
| Min_Above_020 | 6.70 | 5.37 | 3.99 | +24.7% | +67.8% |
| FL_Avg | 0.0143 | 0.0162 | 0.0155 | -11.5% | -7.7% |
| Frac_NonZero | 0.205 | 0.243 | 0.250 | -15.6% | -17.6% |
| Deep % | 14.02 | 12.45 | 13.52 | +12.6% | +3.7% |
| REM % | 20.09 | 24.79 | 24.03 | -19.0% | -16.4% |
| Awake min | 10.54 | 7.10 | 9.78 | +48.5% | +7.7% |
| TIB min | 357.76 | 385.94 | 378.63 | -7.3% | -5.5% |
| Total sleep min | 347.23 | 378.84 | 368.84 | -8.3% | -5.9% |
| Metric | Recent 7d | Prior 7d | Δ | Δ % |
|---|---|---|---|---|
| AHI | 2.020 | 1.550 | +0.470 | +30.3% |
| OA | 8.714 | 7.714 | +1.000 | +13.0% |
| H | 3.714 | 2.286 | +1.429 | +62.5% |
| CA | 0.286 | 0.143 | +0.143 | +100.0% |
| RERA | 2.429 | 0.714 | +1.714 | +240.0% |
| Pressure_Avg | 7.456 | 7.767 | -0.311 | -4.0% |
| Pressure_90 | 10.269 | 10.286 | -0.017 | -0.2% |
| Leak_Avg | 1.700 | 1.184 | +0.516 | +43.5% |
| Leak_90 | 5.143 | 4.629 | +0.514 | +11.1% |
| Leak_Max | 27.600 | 22.800 | +4.800 | +21.1% |
| Usage hours | 6.427 | 6.544 | -0.117 | -1.8% |
| Deep % (Apple) | 12.453 | 14.790 | -2.337 | -15.8% |
| REM % (Apple) | 24.786 | 23.706 | +1.080 | +4.6% |
| Awake min (Apple) | 7.097 | 14.050 | -6.953 | -49.5% |
| Sleep min (Apple) | 378.844 | 372.253 | +6.591 | +1.8% |
| TIB min (Apple) | 385.941 | 386.303 | -0.363 | -0.1% |
| FL_P95 | 0.096 | 0.091 | +0.004 | +4.7% |
| Min_Above_010 | 17.500 | 16.271 | +1.229 | +7.6% |
| Min_Above_020 | 5.371 | 3.143 | +2.229 | +70.9% |
| Date | AHI | OA | CA | RERA | PAvg | P90 | LAvg | LMax | L90 | FL_P95 | MinAbv010 | MinAbv020 | Deep% | REM% | Awake |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-30 | 1.44 | 7 | 0 | 0 | 8.01 | 10.40 | 1.18 | 16.8 | 3.6 | 0.10 | 16.9 | 2.0 | 16.10 | 18.32 | 24.59 |
| 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 |
Correlations computed across full available history (2026-06-23 → 2026-10-09).
| Pair | the user r | Interpretation |
|---|---|---|
| AHI vs deep_pct | +0.069 | negligible |
| AHI vs awake_min | +0.040 | negligible |
| OA vs awake_min | +0.095 | negligible |
| CA vs deep_pct | +0.054 | negligible |
| Leak_Avg vs deep_pct | -0.143 | weak negative |
| Leak_90 vs deep_pct | -0.111 | weak negative |
| Leak_Max vs awake_min | +0.026 | negligible |
| FL_P95 vs awake_min | -0.078 | negligible |
| Min_Above_010 vs deep_pct | +0.020 | negligible |
Bucket comparison (Leak_90 median split, median = 2.40): - Low-leak nights (n=61): mean deep% 15.20, awake 14.34 min - High-leak nights (n=40): mean deep% 13.60, awake 11.50 min - Δ (high – low): deep% -1.60 pp, awake -2.83 min
Direction and effect size unchanged from yesterday with one additional night added. Tonight's Leak_90 of 4.80 lands in the high-leak bucket (above the 2.40 median) and tonight's deep% of 14.02 is slightly above the high-leak bucket mean (13.60) — so the leak-to-deep weak-negative association is not visible in tonight's single point; architecture tonight is not well explained by leak metrics.