Table 2 The top 15 most important features influencing CKD detection across models
Rank | Features | Description |
|---|---|---|
1 | difbak | Difficulty falling back asleep after waking during the night. |
2 | am930cig | Time since the last cigarette, recorded at 9:30 AM. |
3 | candur | Duration (in hours) of usable nasal cannula signal during polysomnography. |
4 | arremop | Number of times a person wakes up during REM sleep while sleeping in a non-supine position (side or stomach). |
5 | am7drk | Time since the last caffeinated drink as of 7:00 AM. |
6 | remlaiip | Time to enter REM sleep after initially falling asleep, excluding periods of wakefulness. |
7 | lowexclude | A measure used to exclude non-significant apnea events. |
8 | aprtdurop | Total duration of apnea episodes in REM sleep while sleeping in a non-supine position. |
9 | carop5 | The average duration of central apnea episodes in REM sleep, with oxygen desaturation of 5% or more. |
10 | quabdo | Quality of abdominal effort signal recorded during polysomnography. |
11 | oindex | An overall index measuring sleep-disordered breathing severity. |
12 | am930drk | Time since the last caffeinated drink as of 9:30 AM |
13 | pctsa90hge2 | Percentage of sleep time when oxygen levels drop below 90%. |
14 | ortdurop | Total duration of obstructive apnea episodes in REM sleep while sleeping in a non-supine position. |
15 | alpdel | Brain activity (alpha waves) during non-REM sleep indicates disturbed sleep. |
