Country of birth was classified as either Sweden or other (missing information was categorised as other).
All other missing information was noted as not available and was not reported in subsequent analyses.
A total of 10 382 participants aged over 20 years with available serum carotenoid levels and no other missing information on questionnaires and biomarkers at baseline (NHANES III) were included in the present study.
Other "missing information": (i) Were the F2's obtained from a single F1?
12 SES was grouped into five categories based on maternal occupation at birth: upper white-collar workers, for example, physicians and teachers; lower white-collar workers, for example, nurses and secretaries; blue-collar workers, for example, cooks and cashiers; others; and missing information as published elsewhere.
SES was grouped into five categories based on the Finnish Classification of Occupations, 10 which was developed according to international recommendations: upper white-collar workers, such as physicians and lawyers; lower white-collar workers, such as nurses and secretaries; blue-collar workers, such as cooks and cashiers; others; and missing information, as categorised and published elsewhere.
Upon arrival, all data were screened in detail by a dedicated intensive care specialist for any missing information, insufficient detail, or any other queries.
On arrival, all data were screened in detail by a dedicated intensive care specialist for any missing information, logical errors, insufficient detail, or any other queries.
On arrival, all data were screened in detail by a dedicated intensive care specialist for any missing information or logical errors or insufficient detail or any other queries.
