| Phenotype | Chronotype was assessed using a singl self-evaluatation question from a shortend version of Horne and Ostber'gs MEQ (sMEQ) on chronotype. The sMEQ included 6 items (items 4,7,9,15,17 and 19) from the original MEQ. The answers were scored according to the scoring of the original MEQ. For the single self-evaluation question item 19 was used. The question was used as a binary varable in which those who replied either "rather more an evening than a morning type" or "definitely an evening type" were regarded as evening types, and those who replied "definitely a morning type" or "rather more a morning type than an evening type" were regarrded as morning types. |
| Sample Ancestry | European (Finnish) |
| Total number | 8,433 individuals |
| Detailed numbers |
4,674 cases (55.43%)
3,759 controls
47.78% Male samples
|
| Number of Cohort(s) | 1 |
| Cohort Short Name | Cohort Full Name | Previous/other/additional names (e.g. sub-cohorts) |
|---|---|---|
| FINRISK | FINRISK | — |
Included participants from the National FINRISK 2007 and 2012 studies