Table 3.

Response Rates at 1 and 24 Hours

	Compliance (1 hr)		Compliance (24 hr)
Alert or Alerting Situation	Control Group (%)	Study Group (%)	Control Group (%)	Study Group (%)	Comparison of Curves* (p-value)
Synchronous, no digoxin level	6	19†	22	38†	0.0003
Synchronous, no K+ level	9	57†	49	81†	0.0001
Synchronous, no Mg2+ level	12	40†	44	66†	0.0000
Synchronous, low Mg2+	6	23‡	47	56 (NS)	< 0.2
Synchronous, low K+	22	39 (NS)	74	65 (NS)	< 0.2
Asynchronous, low Mg2+	5	49†	70	87†	0.0000
Asynchronous, low K+	6	35†	77	93†	0.0000

NS designates no statistically significant difference between the values in the control and study groups.

K⁺ = potassium;

Mg²⁺ = magnesium.

^*Comparisons of compliance curves made using log-rank statistic.

^†p < 0.01 using χ² test.

^‡p < 0.05 using Fisher's exact test.