African Ancestry Is a Predictor Factor to Secondary Progression in Clinical Course of Multiple Sclerosis

Table 3

Multiple Cox regression survival analysis: risk of reaching progression according to ethnicity and clinical features at the onset of disease.

Outcome/variable	Risk	95% CI	𝑃 value
Progression
African descent	2.0	1.1–3.4	0.02
30 years of age or older at onset	2.0	1.1–3.3	0.02
2 or more exacerbations during the first year	2.3	1.2–4.3	0.009