Table 3 Mensa vs. Control differences in covariates potentially influencing sleep timing.
From: The relationship between chronotype and intelligence: the importance of work timing
t | df | p | Mean Difference | SE | 95% CI | ||
|---|---|---|---|---|---|---|---|
Lower | Upper | ||||||
Work start time | −2.33 | 751.00 | 0.02 | −0:13:59.63 | 0:06:00.957 | −0:25:48.23 | −0:02:11.02 |
Commute duration | 0.97 | 756.00 | 0.33 | 1.41 | 1.46 | −1.46 | 4.27 |
Cigarettes/day | 3.44 | 806.00 | 0.00 | 1.27 | 0.37 | 0.55 | 2.00 |
Beer/day | 2.57 | 807.00 | 0.01 | 0.17 | 0.07 | 0.04 | 0.31 |
Glass wine/day | 0.69 | 807.00 | 0.49 | 0.02 | 0.03 | −0.04 | 0.09 |
Liquor/day | 0.05 | 807.00 | 0.96 | <0.01 | 0.01 | −0.02 | 0.03 |
Coffee/day | 2.79 | 807.00 | 0.01 | 0.35 | 0.13 | 0.11 | 0.60 |
Caffeine drink/day | −1.96 | 807.00 | 0.05 | −0.16 | 0.08 | −0.32 | 0.00 |
Tea/day | −1.54 | 807.00 | 0.12 | −0.16 | 0.11 | −0.37 | 0.04 |
Hypnotic/day | −1.11 | 807.00 | 0.27 | −0.01 | 0.01 | −0.03 | 0.01 |
