Table 1.

Timing for analyses performed with various data sizes

Data size	Fixed effects model with no missing data	Fixed effects model with 5.9% missing data	Mixed effects model with 5.9% missing data
27 k, n = 200	2	10	971
27 k, n = 1000	14	73	1409
450 k, n = 200	37	153	15 744
450 k, n = 1000	658	1621	22 993

Times in seconds, based on Intel Xeon 2.8 GHz, with 12 GB RAM. Model includes one covariate and either fixed or random chip effects.