Table 3. Frequency distribution of mortality rate in two groups on the first and fifth day of intervention.

Time	Probability of mortality	Case group frequency (%)	Control group frequency (%)	Z	P
First day	0-10%	21 (52.5%)	16 (40%)	1.02	0.31
	15-20%	13 (32.5%)	17 (42.5%)
	40-50%	6 (15%)	6 (15%)
	50-60%	0	0
Fifth day	0-10%	26 (70.3%)	23 (60.5%)	0.74	0.46
	15-20%	7 (18.9%)	12 (31.6%)
	40-50%	4 (10.8%)	1 (2.6%)
	50-60%	0	2 (5.3%)
Wilcoxon test	Z	1.99	2.19	-