Table 7 Changes of Hospital Case numbers of TKA over time with Post-Hoc-Tests

From: Impact of suspending minimum volume requirements for knee arthroplasty on hospitals in Germany: an uncontrolled before–after study

  Percentage of hospitals with caseload ≥ 50/year Post-hoc-tests (Bonferroni-correction)
Mean SD 95%-confidence interval
Lower limit Upper limit 2006 2008 2010 2012 2013 2014
2006 88.06 1.68 84.77 91.35 x      
2008 91.63 1.47 88.74 94.53 0.916 x     
2010 90.13 1.51 87.17 93.10 1.000 1.000 x    
2012 77.94 2.01 74.0 81.87 < 0.001 < 0.001 < 0.001 x   
2013 71.59 2.23 67.21 75.96 < 0.001 < 0.001 < 0.001 0.011 x  
2014 73.27 2.2 68.95 77.60 < 0.001 < 0.001 < 0.001 0.407 1.000 x