Table 2.

Sleep and activity behaviors according to the moon phases (n = 5812 participants and 33,710 observations).

Behaviors	Full moona–half moonb β (95% CI)	Full moona–new moonc β (95% CI)
Sleep duration (min/day)	−2.2 (−4.9; 0.5)	−4.9 (−2.2; −7.6)*
MVPA (min/day)	−0.6 (−2.4; 1.2)	−0.9 (−2.1; 0.5)
LPA (min/day)	−0.5 (−2.1; 1.6)	0.3 (−2.0; 2.0)
SED (min/day)	1.1 (−1.8; 4.1)	−0.9 (−3.7; 1.9)

Data are presented as unstandardized β coefficients with 95% confidence intervals using a multilevel linear mixed model with participants and schools as random effects and sites as fixed effects. Age, sex, highest parental education, day of measurement, and body mass index z-score were included as covariates. Data for MVPA have been back-transformed to their original units.

^aFull moon ±4 days (includes 30% of observations).

^bHalf moon refers to ±5–9 days from full moon (includes 33% of observations).

^cNew moon refers to ±10–14 days from full moon (includes 37% of observations).

*Significant difference from full moon (P < 0.01).

MVPA, moderate-to-vigorous physical activity; LPA, light-intensity physical activity; SED, sedentary time.