Table 3

Comparison of outcome measures before and after the interventions
Before changes (Jan 2005 – Feb 2008) After changes (Mar 2008 – Apr 2010) P-value (Difference between before and after changes)
Cancellation rate (mean % per month) 8.5 4.9 <0.0011
Transformed cancellation rate2 0.30 0.22 <0.0011
Total number of scheduled operations (median per month) 373 400 0.04 3
Total number of performed operations (median per month) 323 378 0.04 3 323 378 0.04 2
Emergency cases (median per month) 102 103 1.0 3 102 103 1.0 2
(Based on time the time period Jan 2006 to Apr 2010)
Number of consultation at outpatient clinic (mean per month) 2722 3021 0.006 1
(Based on the time period May 2006 to Apr 2010)

1 Student’s t-test.

2 Using the Freeman-Tukey double arcsine transformation.

3 Mann–Whitney U test.

Hovlid et al.

Hovlid et al. BMC Health Services Research 2012 12:154   doi:10.1186/1472-6963-12-154

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