Table 1.

Baseline Demographics of Patients

	All Patients		Impact MRI Group		Non-Impact MRI Group		P-Value
Number of patients	140		39	28%	101	72%
Age	37		33	(30–37)^*	39	(36–41)^*	.01^{^†^‡}
Gender
Male	53	38%	14		39		.85^{^§}
Female	87	62%	25		62
BMI	28.2		28.2		27.8		.86^{^†}
Obesity	48	34%	13	33%	35	35%	1.00^{^§}
Smokers	21	15%	7	18%	14	14%	.60^{^§}
Referring provider
UMHS	122	87%	33	85%	99	88%	.56^{^§}
Non-UMHS	18	13%	6	15%	12	12%	.56^{^§}
Previous hand surgery/trauma	41	29%	10	26%	31	31%	.68^{^§}
Charlson Comorbidity Index	0.31		0.18		0.36		.15^{^§}
Prior therapy/splinting/injections	87	62%	21	54%	66	65%	.25^{^§}
Insured in healthcare	133	95%	37	95%	96	95%	1.00^{^§}
MRI timing (<6 weeks of symptoms)	48	34%	19	49%	29	29%	.03^*^{^§}

BMI, body mass index; MRI, magnetic resonance imaging; UMHS, University of Michigan Health System.
↵* 95% confidence interval (CI).
↵† Student t-test.
↵‡ Statistical significance.
↵§ Fisher exact test.