Detrended fluctuation analysis of photoplethysmogram pulse rate intervals in sleep disordered breathing
Bibliographic record
Abstract
The fluctuation of heartbeat intervals is irregular and erratic in healthy young individuals. Sleep disordered breathing (SDB) influences the fluctuation of heart rate. In this study, we investigated the effects of SDB on heart rate fluctuations by analyzing the short- and long-range correlation of photoplethysmogram pulse to pulse intervals (PPIs). We recruited 160 children referred to British Columbia Children's Hospital for overnight polysomnography and recorded the photoplethysmogram (PPG) using the Phone Oximeter™. Detrended fluctuation analysis was applied to analyze the scaling behavior of PPIs time series in children with and without SDB. We found stronger short-range (10 to 40 pulses) and long-range (70 to 200 pulses) correlation in children with SDB. This reflects the loss of irregularity of heart rate in children with SDB.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".