Table 4.

Incidence of Erectile Dysfunction by Injury Severity Using Cox Regression Model.

	Traumatic brain injury
	Yes			No
Injury severity	ED	PYs	Rate	ED	PYs	Rate	Adjusted HR (95% CI)	p- value
Total	64	259,480.24	24.66	146	765,676.72	19.07	2.569 [1.890, 3.492]	<.001
Outpatient (mild)	35	152,418.07	22.96	146	765,676.72	19.07	2.305 [1.672, 3.124]	<.001
Inpatient (moderate)	22	93,607.72	23.50	146	765,676.72	19.07	2.551 [1.884, 3.331]	<.001
ISS ≧16 (severe)	7	13,454.45	52.03	146	765,676.72	19.07	5.467 [2.452, 7.706]	<.001

Note. ED, erectile dysfunction; PYs, person-years; rate, incidence rate in per 10,000 person-years; CI, confidence interval; HR = hazard ratio. Adjusted HR: multivariable analysis included sex, age, covariates, and comorbidities (dementia, schizophrenia, anxiety, bipolar disorder, depression, stroke, coronary artery disease, chronic obstructive pulmonary disease, chronic kidney disease, hypertension, diabetes mellitus, hyperlipidemia, asthma, alcohol-related illness, fracture, dislocation, sprains and strains, open wound, injury to blood vessels, superficial injury/contusion, crushing, foreign body entering through orifice, burn, injury to nerves and spinal cord, poisoning).