Fig. 1

Repeated measures analysis of variance. a. HR values at time zero and two hours in patients who were admitted and discharged from the ED. There was no significance in the association between the change in HR between t=0 and t=2 hours with patient disposition (F = 0.62, P = 0.435). There was a significant difference in the mean HR when patients were grouped by disposition (p = 0.043). b. CO values at time zero and two hours in patients who had an infectious source and those without an infectious source. There was a significant association between the change in CO between t=0 and t=2 hours with infection (F = 2.48, P = 0.122). There was no significant difference in the mean CO when patients were grouped by source (p = 0.804). c. CI values at time zero and two hours in patients who had an infectious source and those without an infectious source. There was a significant association between the change in CI between t=0 and t=2 hours with infection (F = 2.82, P = 0.100). There was no significant difference in the mean CI when patients were grouped by source (p = 0.293). d. HR values at time zero and two hours in patients who had an infectious source and those without an infectious source. There was a significant association between the change in HR between t=0 and t=2 hours with infection (F = 5.32, P = 0.026). There was a significant difference in the mean HR when patients were grouped by source (p = 0.044). All data represented as means with error bars equal to 95% confidence interval. When associating NICOM values at time zero and two hours with another dependent variable (ie. patient disposition, LOS, or infectious source) a P-value of less than 0.25 was taken to be significant. Otherwise a p-value of less than 0.05 was used. CO indicates, cardiac output; CI, cardiac index; HR, heart rate