Do Systemic Factors Influence the Fate of Nonunions to Become Atrophic? A Retrospective Analysis of 162 Cases

Table 1

Summary of events relative to atrophic versus hypertrophic nonunions depicted as odds ratio and confidence interval. If odds ratio is higher than 1, the event with the first odds is more likely in atrophic nonunions. In case of odds ratio less than 1 the second event is more likely in hypertrophic nonunions.

Parameter		Patients [n]		95 % Confidence Interval		Odds Ratio
		atrophic	hypertrophic	Lower	Upper
allergy	No	53	69	1.035	5.130	2.304
	Yes	10	30
gender	Female	33	37	0.971	3.497	1.843
	Male	30	62
concomitant injuries	No	47	62	0.872	3.524	1.753
	Yes	16	37
fracture type	Closed	49	69	0.732	3.166	1.522
	Open	14	30
NSAID	No	50	72	0.679	3.064	1.442
	Yes	13	27
implant loosening	No	37	63	0.426	1.554	0.813
	Yes	26	36