Table A4: Prevalence of Celiac Disease in Asymptomatic Patients Presenting with Ataxia.

Study Country N	Study Design Recruitment	Patient Population Symptoms	% positive serology IgA tTG IgA EMA	% positive small bowel biopsy
Abele et al. (43) (2003) Germany N=105 (32 sporadic adult-onset ataxia of unknown origins, 73 controls) Adults	• Study design Cross-sectional • Recruitment Cases: recruited at the neurology department Controls: age- and gender-matched, recruitment process unclear	• Patient characteristics Cases Mean age ± SD: 55 ± 14 yrs Mean disease duration ± SD:11 ± 11 yrs Female: 13 (40.6%) Controls Mean age ± SD: 53 ± 14 yrs Female: 34 (46.6%) • Participation rate Not reported	• IgA EMA 1/32 (3.1%) Controls: 1/73 (1%) NS	Not evaluated

CD celiac disease; EMA endomysial antibody; IgA immunoglobulin A; NS not statistically significant; SD standard deviation; yr year