Table 1.

Patient characteristics by the nonunion status

Characteristic	All N = 853		With nonunion N = 99		Without nonunion N = 754		P values
	N	%	N	%	N	%
Sex:
Male	378	44.3%	47	47.5%	331	43.9%	0.50†
Female	475	55.7%	52	52.5%	423	56.1%
Age at Index Date:
Median	54		53		55		0.54‡
Mean	53		52		53
SD	16		15		17
Range	18–93		18–87		18–93
Charlson Comorbidity Index:
Median	1		1		1		0.45‡
Mean	2		2		2
SD	2		2		2
Range	0–15		0–7		0–15
Additional fractures:
Lower Limb	612	71.70%	88	88.90%	524	69.50%	< 0.001†
Upper Limb	90	10.60%	12	12.10%	78	10.30%	0.59†
Spine and Trunk	70	8.20%	16	16.20%	54	7.20%	0.0022†
Skull	15	1.80%	5	5.10%	10	1.30%	0.008†
Open fracture status
Open	132	15.5%	30	30.3%	102	13.5%	< 0.001ξ
Closed	721	84.5%	69	69.7%	652	86.5%

Notes: † P-value is based on the T-test, ‡ P-value is based on the Wilcoxon test; ξ - P-value is based on the Chi-Square test; SD – standard deviation.