Table 2.

Sleep variables derived from BISQ in the caffeine group and no-caffeine group.

	No Caffeine (n = 16)	Caffeine (n = 12)	P
Nighttime sleep, min	540 [540–630]	600 [547.5–660]	.45
Daytime sleep, min	165 [90–225]	210 [157.5–292.5]	.15
Total sleep, min	735 [667.5–832.5]	810 [750–892.5]	.13
Night wakening, number	2 [2–3.75]	1 [1–3]	.20
WASO, min	35 [18.75– 45]	20 [10–30]	.20
Longest stretch of time the child is asleep during night, min	240 [180–345]	360 [255–465]	.74
Daytime naps, number	3 [2.25–3]	3 [2–3]	.77

Data were represented as median [interquartile range]. BISQ = Brief Infant Sleep Questionnaire, IQR = interquartile range, WASO = wake after sleep onset.