Table 8.

Lewinnek safe zone analysis

	THA in safe zone (%)
Article	Non-dislocating	Dislocating	p-value
Lewinnek et al. (1978)	64	33	NA
Biedermann et al. (2005)	79	60	< 0.01
Masaoka et al. (2006)	NA	40	NA
Minoda et al. (2006)	72	68	NA
Leichtle et al. (2013)	61	56	> 0.05
Esposito et al. (2015)	60	54	NA
Grammatopoulos et al. (2015)	50	45	0.7
McLawhorn et al. (2015)	53	83	0.2
Danoff et al. (2015)	63.50	47.60	0.04
Opperer et al. (2015)	94.60	91.90	0.7
Abdel et al. (2016)	NA	58	NA

THA: total hip arthroplasty; NA: not assessed.