Table 2.

Multivariate adjusted analysis of risk factors for neck hematoma after thyroid and parathyroid surgery, Nationwide Inpatient Sample 2000–2009

Variable		n	Number of events (%)	OR	CI	p value
Age at discharge, years	18–40 (reference)	32,022	339 (1.1)	1
	41–65	78,540	1137 (1.4)	1.4	1.1–1.6	0.002
	> 65	36,782	734 (2)	1.8	1.4–2.1	< 0.001
Sex	Female (reference)	114,151	1498 (1.3)	1
	Male	32,033	708 (2.2)	1.3	1.2–1.4	< 0.001
Race	White (reference)	79,055	1054 (1.3)	1
	African American	15,973	351 (2.2)	1.5	1.2–1.7	< 0.001
	Hispanic	9803	115 (1.2)	0.9	0.7–1.1	0.26
	Asian	4451	66 (1.5)	1.3	1.0–1.7	0.04
Geographic region	West (reference)	34,442	432 (1.3)	1.0
	South	48,110	860 (1.8)	1.3	1.1–1.4	< 0.001
	Northeast	35,992	426 (1.2)	0.9	0.8–1	0.37
	Midwest	28,800	492 (1.7)	1.2	1–1.4	0.003
Charlson Comorbidity Index score	0 (reference)	74,767	892 (1.2)	1
	1	19,574	342 (1.7)	1.4	1.2–1.7	< 0.001
	2	32,681	508 (1.6)	1.8	1.4–2.1	< 0.001
	≥ 3	20,322	468 (2.3)	2	1.6–2.6	< 0.001
Alcohol abuse	No (reference)	146,800	2183 (1.5)	1
	Yes	544	27 (5)	2.7	1.6–2.5	< 0.001
Diagnosis	Parathyroid diseases (reference)	26,504	386 (1.5)	1
	Benign thyroid disease	79,460	1172 (1.5)	1.5	1.2–1.8	< 0.001
	Thyroid cancer	37,038	530 (1.4)	0.9	0.8–1.2	0.8
	Graves disease	4342	122 (2.8)	3	2.1–4.1	< 0.001
Surgical procedure	Parathyroidectomy (reference)	26,555	296 (1.1)	1	.
	Partial thyroidectomy	64,577	915 (1.4)	1.5	1.3–1.7	< 0.001
	Substernal thyroidectomy	4976	125 (2.5)	3.3	2.8–3.9	< 0.001
	Total thyroidectomy without neck dissection	46,721	777 (1.7)	1.7	1.5–2	< 0.001
	Total thyroidectomy with neck dissection	4515	97 (2.1)	2.3	1.7–4.7	< 0.001

CI = confidence interval; OR = odds ratio.