Table 5.

Effects of time of day on hemodynamics

Time	HR		SBP		DBP
	Mean	95% CI	Mean	95% CI	Mean	95% CI
12 a.m. to 4 a.m.	68.2	63.6 to 72.7	115.9	111.2 to 120.5	60.9	57.5 to 64.2
4 a.m. to 8 a.m.	69.3	64.7 to 73.8	120.1	115.4 to 124.8	64.2	60.8 to 67.6
8 a.m. to 12 p.m.	71.7	67.0 to 76.3	122.5	117.7 to 127.4	68.7	65.2 to 72.2
12 p.m. to 4 p.m.	72.0	67.3 to 76.6	119.6	114.8 to 124.4	66.0	62.5 to 69.4
4 p.m. to 8 p.m.	72.3	67.6 to 76.9	119.7	115.0 to 124.5	64.5	61.0 to 67.9
8 p.m. to 12 a.m.	71.4	66.8 to 76.0	120.6	115.8 to 125.3	63.6	60.2 to 67.1
P for equality of time factor	<0.001		<0.001		<0.001