Table 4.

Effect of Intervention on Time until Treatment Was Started and on Time until Condition Was Resolved, When Alerting Situation Satisfied the Laboratory's Critical Reporting Criteria and a Phone Call Was Made

	Median (Interquartile Range)	Mean (SD)	Range
Time until treatment was ordered (in hours):
All cases meeting laboratory's criteria (N = 97)	1.0 (0.4-2.7)	3.3 (7.6)	0-51.1
Intervention cases: alert plus phone call (n = 43)	0.7 (0.2-2.6)	3.4 (8.0)	0-44.6
Control cases: phone call only (n = 54)	1.1 (0.6-3.0)	3.3 (7.4)	0.1-55.1
P value	0.06*	0.59†	-
Time until condition was resolved (in hours):
All cases meeting laboratory's criteria (N = 94)	7.4 (3.9-17.4)	13.3 (14.8)	0.2-68.1
Intervention cases: alert plus phone call (n = 40)	7.0 (3.4-14.1)	12.8 (15.4)	0.2-68.1
Control cases: phone call only (n = 54)	8.1 (4.0-18.9)	13.7 (14.5)	1.4-64.7
P value	0.43*	0.68†	-

^*Comparison made using the Wilcoxon rank sum statistic.

^†Comparison made using the Student t-test.