Sleep & CPAP Report — 2026-09-21
🚩 Flags
- AHI 1.94 — vs 30d avg 2.08 (-6.8%). 7d avg 2.29 (-15.2%). OA 5 vs 7d avg 10.86. H 6 vs 7d avg 2.86. CA 1. RERA 2.
- Leak_90 1.20 L/min — vs 30d avg 2.04 (-41.2%). Leak_Avg 0.90 (7d 0.66); Leak_Max 14.40 (7d 15.94).
- Sleep architecture: Deep% 13.07 (+5.6% vs 7d, -0.1% vs 30d); REM% 23.78 (-1.9% vs 7d, -1.3% vs 30d); Awake 5.52 min (-52.5% vs 7d, -44.7% vs 30d); Efficiency 98.49%.
- Time in bed 366.3 min (6h 6.3m) — vs 30d 384.8 (-4.8%). Total sleep 360.8 min. CPAP usage 6.20h.
Summary Table — Night of 2026-09-21
| Metric |
Value |
| Sleep start |
2026-09-21T23:21:22-05:00 |
| Time in bed |
366.3 min (6h 6.3m) |
| Total sleep |
360.8 min (6h 0.8m) |
| Sleep efficiency |
98.49% |
| Awake time |
5.52 min |
| Core (N1+N2) sleep |
227.8 min / 63.14% |
| Deep (N3) sleep |
47.17 min / 13.07% |
| REM |
85.81 min / 23.78% |
| CPAP usage hours |
6.20 |
| Session count |
1 |
| AHI |
1.94 |
| RDI |
2.26 |
| Obstructive apneas (OA) |
5 |
| Hypopneas (H) |
6 |
| Central apneas (CA) |
1 |
| Unclassified apneas (UA) |
0 |
| RERA |
2 |
| Pressure_Avg |
7.82 |
| Pressure_Min |
4.00 |
| Pressure_Max |
12.18 |
| Pressure_90th |
10.46 |
| Leak_Avg |
0.90 |
| Leak_Max |
14.4 |
| Leak_90th |
1.20 |
| FL_Avg |
0.0150 |
| FL_P95 |
0.09 |
| FL_Max |
0.39 |
| Min_Above_005 |
37.5 |
| Min_Above_010 |
16.2 |
| Min_Above_020 |
2.9 |
| Frac_NonZero (FL samples) |
23.51% |
Comparison to Trailing Averages
| Metric |
Tonight |
7d avg |
30d avg |
Δ vs 7d |
Δ vs 30d |
| AHI |
1.94 |
2.29 |
2.08 |
-15.2% |
-6.8% |
| OA count |
5.00 |
10.86 |
10.03 |
-53.9% |
-50.2% |
| H count |
6.00 |
2.86 |
2.53 |
+110.0% |
+136.8% |
| CA count |
1.00 |
1.14 |
0.97 |
-12.5% |
+3.4% |
| RERA count |
2.00 |
0.43 |
0.80 |
+366.7% |
+150.0% |
| Pressure_Avg |
7.82 |
7.49 |
7.40 |
+4.4% |
+5.6% |
| Pressure_90 |
10.46 |
9.85 |
9.89 |
+6.2% |
+5.7% |
| Leak_Avg |
0.90 |
0.66 |
0.73 |
+35.5% |
+23.1% |
| Leak_Max |
14.40 |
15.94 |
16.84 |
-9.7% |
-14.5% |
| Leak_90th |
1.20 |
2.23 |
2.04 |
-46.2% |
-41.2% |
| Usage hours |
6.20 |
6.50 |
6.51 |
-4.7% |
-4.8% |
| FL_P95 |
0.090 |
0.099 |
0.094 |
-8.7% |
-3.9% |
| Min_Above_010 |
16.20 |
17.76 |
16.88 |
-8.8% |
-4.0% |
| Min_Above_020 |
2.90 |
4.16 |
3.81 |
-30.2% |
-24.0% |
| Awake min |
5.52 |
11.61 |
9.99 |
-52.5% |
-44.7% |
| TIB min |
366.31 |
385.66 |
384.83 |
-5.0% |
-4.8% |
| Total sleep min |
360.79 |
374.05 |
374.85 |
-3.5% |
-3.7% |
| Deep % |
13.07 |
12.38 |
13.08 |
+5.6% |
-0.1% |
| REM % |
23.78 |
24.23 |
24.10 |
-1.9% |
-1.3% |
| Core % |
63.14 |
63.39 |
62.81 |
-0.4% |
+0.5% |
Week-over-Week Deltas (recent 7d 2026-09-15–2026-09-21 vs prior 7d 2026-09-08–2026-09-14)
| Metric |
Recent 7d |
Prior 7d |
Δ |
Δ % |
| AHI |
2.201 |
2.177 |
+0.024 |
+1.1% |
| OA |
9.857 |
10.429 |
-0.571 |
-5.5% |
| CA |
1.000 |
1.143 |
-0.143 |
-12.5% |
| Pressure_Avg |
7.547 |
7.307 |
+0.240 |
+3.3% |
| Leak_Avg |
0.670 |
0.613 |
+0.057 |
+9.3% |
| Leak_90 |
1.714 |
1.543 |
+0.171 |
+11.1% |
| Deep % (Apple) |
12.11 |
12.52 |
-0.41 |
-3.3% |
| REM % (Apple) |
24.53 |
22.93 |
+1.60 |
+7.0% |
| Awake min (Apple) |
11.97 |
8.82 |
+3.15 |
+35.8% |
| Sleep min (Apple) |
376.63 |
359.56 |
+17.07 |
+4.7% |
| FL_P95 |
0.097 |
0.087 |
+0.010 |
+11.5% |
| Min_Above_010 |
17.814 |
14.529 |
+3.286 |
+22.6% |
| Min_Above_020 |
3.986 |
3.986 |
+0.000 |
+0.0% |
Recent 10-Night Context
| Date |
AHI |
OA |
CA |
PAvg |
P90 |
LAvg |
LMax |
L90 |
FL_P95 |
MinAbv010 |
MinAbv020 |
Deep% |
REM% |
Awake |
| 2026-09-12 |
1.81 |
8 |
1 |
7.17 |
9.92 |
0.45 |
14.4 |
1.20 |
0.08 |
12.7 |
3.9 |
18.06 |
27.63 |
9.53 |
| 2026-09-13 |
2.60 |
14 |
1 |
7.78 |
10.16 |
0.47 |
18.0 |
0.00 |
0.11 |
19.1 |
7.6 |
8.29 |
20.78 |
18.06 |
| 2026-09-14 |
2.55 |
12 |
2 |
7.43 |
10.26 |
0.86 |
27.6 |
4.80 |
0.10 |
15.8 |
4.1 |
14.93 |
21.67 |
3.01 |
| 2026-09-15 |
1.93 |
10 |
0 |
7.76 |
10.02 |
0.74 |
14.4 |
2.40 |
0.12 |
21.2 |
6.9 |
12.66 |
24.62 |
8.53 |
| 2026-09-16 |
2.85 |
16 |
4 |
7.20 |
9.68 |
0.09 |
8.4 |
0.00 |
0.08 |
13.5 |
2.8 |
9.37 |
22.95 |
10.04 |
| 2026-09-17 |
2.41 |
11 |
2 |
7.17 |
9.22 |
0.52 |
10.8 |
1.20 |
0.07 |
12.0 |
3.3 |
18.64 |
20.41 |
20.07 |
| 2026-09-18 |
0.87 |
5 |
0 |
7.07 |
9.56 |
0.18 |
8.4 |
0.00 |
0.09 |
16.4 |
2.9 |
11.51 |
23.16 |
10.54 |
| 2026-09-19 |
3.23 |
15 |
0 |
7.60 |
9.64 |
0.41 |
14.4 |
1.20 |
0.10 |
16.8 |
2.1 |
10.83 |
25.42 |
14.55 |
| 2026-09-20 |
2.18 |
7 |
0 |
8.21 |
10.54 |
1.85 |
27.6 |
6.00 |
0.13 |
28.6 |
7.0 |
8.70 |
31.40 |
14.55 |
| 2026-09-21 |
1.94 |
5 |
1 |
7.82 |
10.46 |
0.90 |
14.4 |
1.20 |
0.09 |
16.2 |
2.9 |
13.07 |
23.78 |
5.52 |
CPAP → Sleep-Stage Correlations (all 82 matched nights)
Correlations computed across full available history (2026-06-23 → 2026-09-21).
| Pair |
the user r |
Interpretation |
| AHI vs deep_pct |
+0.061 |
negligible |
| AHI vs awake_min |
+0.056 |
negligible |
| OA vs awake_min |
+0.084 |
negligible |
| CA vs deep_pct |
+0.073 |
negligible |
| Leak_Avg vs deep_pct |
-0.152 |
weak negative |
| Leak_90th vs deep_pct |
-0.171 |
weak negative |
| Leak_Max vs awake_min |
+0.071 |
negligible |
| FL_P95 vs awake_min |
-0.081 |
negligible |
| Min_Above_010 vs deep_pct |
-0.060 |
negligible |
Bucket comparison (Leak_90 median split, median = 1.2):
- Low-leak nights (n=42): mean deep% 15.14, awake 14.53 min
- High-leak nights (n=40): mean deep% 13.88, awake 13.81 min
- Δ (high – low): deep% -1.27 pp, awake -0.72 min
Caveats
- Sleep session started at 2026-09-21T23:21:22-05:00 — matched to the 2026-09-21 CPAP file. Nights where the Apple Watch session begins after midnight (e.g. 00:12) are attributed to the previous CPAP calendar date; for daily health-export files, the filename's first date is the authoritative night key.
- Apple Watch SpO2/pulse channels not present in current CPAP CSV export.
- Correlations are directional/small-effect only — single-night deviations often exceed what correlations alone would predict.
- All flagged metrics remain within clinically safe ranges (AHI < 5, leak within mask spec); flags mark deviations from the user's own recent baseline, not clinical thresholds.
- Duplicate
2.json / 3.json health-report files (iCloud dedup artifacts) are ignored in favor of the primary copy.
- Matched-night count is 82. Early 2026-06 nights (via multi-day roll-up) have zero-valued pressure/leak channels and remain low-confidence for CPAP metrics prior to ~2026-06-22.