Table 3

 Incidence of ALS in men and women 45 to 74 years old by latitude gradient in selected studies in Europe which used a prospective cohort design, age adjusted to the 1990 US population

CountryYearsLatitude (°)IR menIR womenCombined IR95% CI IR
CI, confidence interval; IR, incidence rate.
Scotland198955 to 596. to 6.4
Ireland1995 to 199752 to 556. to 6.9
Piemonte (Italy)1995 to 199644 to 465. to 6.3
Puglia (Italy)1998 to 199940 to 425. to 5.7