Table 1

Main characteristics of the Cosali and PrediCTS cohorts

CosaliPrediCTS
Recruiting areaLoire Valley area of West Central, FranceSt. Louis area, USA
Recruiting periodApril 2002–2005July 2004–October 2006
Years of follow-up2007–20102007–2011
Occupational sectorsAgriculture
Industry
Services
Construction
Clerical
Services
Construction
Number of participants included in the cohort37101107
Number of participants included in the analysis1551 (41.8%)711 (64.2%)
CTS definition
 Standardised physical examination at baselineYesYes
 Nerve conduction studies at baselineNoYes
Work exposures assessmentSelf-administrated questionnaireJob exposure matrix
Representativeness of the population of workersYesNo
Consideration of confoundersYesYes