Table 4.

A. Logistic regression model of factors associated with obtaining at least one laboratory test for acquired causes of ataxia prior to referral to subspecialist
At least one lab test completed	Odds ratio (95% CI)	p-Value
Full model:
Worsening of symptoms	2.76 (0.99 to 7.66)	0.051
Family history of ataxia	0.15 (0.05 to 0.51)	0.002
Family history of other neurological disorders	0.34 (0.12 to 0.94)	0.04
Stepwise model:
SAME AS FULL MODEL

B. Linear regression model of factors associated with number of laboratory tests for acquired causes of ataxia obtained prior to referral to subspecialist
Number of laboratory tests for acquired causes	Coef. (95% CI)	p-Value
Full model:
Referred for ataxia	−1.45 (−3.04 to 0.12)	0.07
Family history of ataxia	−3.68 (−5.64 to −1.71)	0.004
Stepwise model:
SAME AS FULL MODEL