Table 1.
Details of samples included in this study, with respective Ns for different analyses
| Study | Type of data | Number of individuals in GWAS | Number of individuals in phenotypic analyses |
|---|---|---|---|
| ELSA | IPD | 6,028 | 5,296 |
| UKHLS | IPD | 8,608 | 6,811 |
| UKB | Summary a | 127,573 | N/A |
| Total N | N/A | 142,209 | 12,107 |
Note. ELSA: English Longitudinal Study of Ageing; IPD: individual participant data; UKB: UK Biobank; UKHLS: UK Household Longitudinal Study.
a
Summary statistics from sleep duration GWAS by Jones et al. (2016) downloaded from http://www.t2diabetesgenes.org/data/