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

Table 10 Effect of minimum volume requirements suspension in 2011 on quality indicator values for total knee arthroplasty (TKA)

	Multifactorial MANOVA, paired sample					Bonferroni-adjusted post-hoc-tests
TKA Quality Indicator		2010	2012	2013	2014	2010 versus 2012	2012 versus 2013	2013 versus 2014
TKA meets indication criteria	Mean	94.78	95.91	96.06	96.57
TKA meets indication criteria	p	< 0.001				< 0.001	1.000	0.223
Perioperative antibiotic-prophylaxis applied	Mean		99.62	99.77	99.66
Perioperative antibiotic-prophylaxis applied	p	< 0.001					0.007	0.295
Postoperative mobility (neutral zero method) measured	Mean	97.32	98.37	97.68	98.46
Postoperative mobility (neutral zero method) measured	p	< 0.001				0.003	0.002	< 0.001
Postoperative mobility of at least 0/0/90 (neutral zero method)	Mean	88.22	90.84	91.59	91.71
	p	< 0.001				< 0.001	0.160	1.000

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