Table 2:

Number of total referrals, number of appropriate referrals and proportion of appropriate referrals for chronic kidney disease in the year after automatic reporting of the estimated glomerular filtration rate began

Outcome measure	Observed	Expected* (95% CI)	Difference (95% CI)	Effect size of intervention, % change above expected (95% CI)
Total no. of referrals	1465	811 (784 to 838)	654 (626 to 682)	80.6 (74.8 to 86.9)
Total no. of appropriate referrals	799	558 (539 to 577)	241 (221 to 261)	43.2 (38.5 to 48.2)
Proportion of referrals that were appropriate	0.55	0.56 (0.38 to 0.74)	−0.016 (−0.17 to 0.20)	−2.8 (−26.4 to 43.4)

Note: CI = confidence interval.

^*Expected numbers and proportions were derived from regression analysis with autoregressive errors.