Table 1.

Comparison of Patient Demographics and Injury History Between Shoulder Instability Patients Either With or Without Comorbid Back Pain

	No Back Pain	Back Pain	P
n	843	158	—
Female, male, n (% female)	147, 696 (17.4)	40, 118 (25.3)	.02
Age, y, mean ± SD	23.4 ± 8.3	28.1 ± 10.2	<.001
Body mass index, mean ± SD	25.5 ± 4.3	26.6 ± 4.9	.003
Injury during sport, n (%)	637 (75.5)	99 (62.8)	.001