. 2015 Oct 1;23(2):80–85. doi: 10.1136/ejhpharm-2015-000736

Table 1.

Readmissions within 30 days for the intervention and control wards before and during the intervention

	Control ward		Intervention ward		Two sample z-test for difference in population proportions
Patient numbers	Discharges	Readmissions	Discharges	Readmissions	Two sample z-test for difference in population proportions
12-month period prior to intervention	446	72 (16.1%)	403	78 (19.4%)	Not significantly different
12-month intervention period	490	107 (21.8%)	418	69 (16.5%)	z=2.05, p=0.041
Pearson's goodness-of-fit χ² test for difference in proportions	Not significantly different χ²=3.33, p=0.068		Not significantly different χ²=1.52, p=0.375