Table 2.

Model results.

Fixed Effects	Accelerometer		GPS
	${\mathrm{e}}^{\mathrm{\beta }}$ (95% CI)	SD	${\mathrm{e}}^{\mathrm{\beta }}$ (95% CI)	SD
Intercept	0.191 (0.089, 0.485)	0.435	0.269 (0.168, 0.459)	0.255
Time (weeks)	1.005 (1.004, 1.007)	0.001	1.009 (1.007, 1.010)	0.001
iOS user	1.301 (0.803, 2.114)	0.246	0.660 (0.453, 0.948)	0.188
Male	0.821 (0.576, 1.171)	0.179	0.822 (0.607, 1.106)	0.152
4-year degree or higher	0.786 (0.332, 1.839)	0.437	0.688 (0.339, 1.416)	0.364
Non-Hispanic Black	1.638 (1.059, 2.517)	0.223	1.329 (0.907, 1.953)	0.196
Asian	0.724 (0.486, 1.100)	0.205	0.898 (0.630, 1.295)	0.183
American Indian	1.137 (0.637, 2.047)	0.298	1.241 (0.758, 2.044)	0.255
Other/Multiple	0.978 (0.232, 4.074)	0.727	0.926 (0.257, 3.240)	0.649
Age (10 years)	1.010 (0.973, 1.048)	0.019	1.011 (0.982, 1.042)	0.015

Random Effects	SD (95% CI)	Groups	SD (95% CI)	Groups
Level-1: Participant (${\sigma }_{\gamma }$)	1.012 (0.911, 1.127)	197	0.888 (0.799, 0.983)	197
Level-2: Study (${\sigma }_{\delta }$)	0.721 (0.222, 1.729)	6	0.295 (0.014, 0.906)	6

Model
Observations (N)	28,218		28,053
Shape $\omega$ (95% CI)	0.53 (0.52, 0.54)		0.64 (0.63, 0.65)
Bayes R2 (95% CI)	0.384 (0.365, 0.403)		0.415 (0.391, 0.439)
WAIC (SE)	430,853.5 (710.8)		216,522.5 (549.5)
LOO (SE)	430,856.1 (710.9)		216,524.8 (549.6)

Model estimates for all parameters for sensor non-collection rates of accelerometer (left) and GPS (right). The coefficients and 95% credible intervals (95% CI) have been exponentiated to assist interpretation. Parameters with 95% CIs that exclude 1 are in bold. The reference group for education is less than 4-year degree and that for race/ethnicity is non-Hispanic White.