Table 3.

Sleep parameters derived from actigraphy at different activity thresholds.

Sleep Variables	Low Threshold		Medium Threshold		High Threshold		Automatic Threshold
	Caffeine (−)	Caffeine (+)	Caffeine (−)	Caffeine (+)	Caffeine (−)	Caffeine (+)	Caffeine (−)	Caffeine (+)
Total sleep, min	639 [591–671]	651 [601–705]	675 [631–716]	689 [625–739]	703 [667–740]	709 [649–765]	745 [723–778]	763 [705–780]
Nighttime sleep, min	460 [407–502]	419 [402–491]	512 [435–528]	443 [421–525]	536 [453–549]	466 [436–548]	569 [482–598]	496 [477–570]
Daytime sleep, min	169 [143–232]	190 [175–232]	176 [147–241]	200 [186–254]	183 [150–248]	216 [194–273]	195 [154–257]	241 [199–296]
Sleep onset latency, min	7 [3–10]	6 [2–8]	7 [3–10]	6 [2–8]	7 [3–10]	6 [2–8]	7 [3–10]	6 [2–8]
Sleep efficiency, %	77 [76 –82 ]	81 [72–84]	83 [81–87]	85 [79–88]	87 [85–90]	89 [86–92]	95 [93–96]	95 [94–96]
WASO, min	107 [89–128]	85 [71–128]	78 [63–89]	55 [49–94]	54 [42–63]	38 [28–64]	11 [7–20]	8 [6–14]
Awakenings, number	86 [67–99]	66 [63–88]	75 [69–89]	71 [57–95]	68 [56–74]	66 [44–75]	21 [17–29]	16 [14–25]

No significant differences were detected between the CG and NCG in the sleep parameters with Mann–Whitney U test. Continuous data are expressed as median [interquartile range]. WASO = wake after sleep onset.