Table 2.

Comparison Between Gender and Age Groups for Back Pain Cohort.^a

	Gender Analysis			Age (years) Analysis
	Male (n = 201)	Female (n = 201)	P	18-44 (n = 135)	45-64 (n = 135)	65+ (n = 135)	P
ODI	38.5 (CI: 35.9-41.1)	44.2 (CI: 41.5-46.9)	.005b	36.2 (CI: 32.9-39.5)	45.0 (CI: 41.7-48.3)	44.3 (CI: 41.3-47.3)	<.001b
PROMIS Physical Function	38.3 (CI: 37.1-39.4)	37.0 (CI: 35.9-38.1)	.122	40.2 (CI: 38.8-41.6)	36.7 (CI: 35.4-38.0)	34.8 (CI: 33.5-36.0)	<.001b
PROMIS Pain Intensity	54.2 (CI: 53.3-55.1)	55.4 (CI: 54.4-56.4)	.077	53.5 (CI: 52.3-54.8)	55.9 (CI: 54.8-57.0)	55.0 (CI: 53.9-56.1)	.018b
PROMIS Pain Interference	63.7 (CI: 62.8-64.6)	64.7 (CI: 63.7-65.7)	.151	62.6 (CI: 61.3-63.9)	65.3 (CI: 64.2-66.4)	65.1 (CI: 64.0-66.2)	<.001b

Abbreviations: ODI, Oswestry Disability Index; PROMIS, patient-reported outcomes measurement information system.

^a Values are reported as means with 95% CIs in parentheses.

^b Statistically significant (P < .05).