High quality standards for a large-scale prospective population-based observational cohort: Constances

BMC Public Health

Table 3 Acceptable maneuvers reported by the sites (N = 29,799)

Repeatability criteria satisfied
Study nurse assessment reported in the CRF	Calculated with FVC,FEV₁ data entered in the CRF	Frequency	Percentage
Repeatable	Repeatable	28,396	95.36
Not repeatable	Repeatable	253	0.85
Assessment missing	Repeatable	151	0.51
Repeatable	Not repeatable	804	2.70
Not repeatable	Not repeatable	168	0.56
Assessment missing	Not repeatable	7	0.02

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