Table 2.

Between-person sleep midpoint and postprandial blood glucose concentrations

Predictor	Model without interaction			Model with interaction
	Estimate	95% CI	p value	Estimate	95% CI	p value
(Intercept)	81.13	72.61, 89.65	<0.001	80.70	71.90, 89.51	<0.001
Sleep midpointa	0.52	0.04, 1.01	0.035	0.69	−0.17, 1.55	0.116
Meal (high carb)	−15.92	−17.23, −14.60	<0.001	−14.83	−18.74, −10.93	<0.001
Meal (high fat 35 g)	−42.42	−45.38, −39.46	<0.001	−41.66	−50.39, −32.93	<0.001
Meal (high fat 40 g)	−49.98	−51.39, −48.58	<0.001	−48.17	−52.31, −44.03	<0.001
Meal (high fibre)	−21.20	−22.82, −19.57	<0.001	−17.62	−22.41, −12.83	<0.001
Meal (high protein)	−49.56	−51.11, −48.01	<0.001	−51.21	−55.71, −46.71	<0.001
Meal (MCM at home)	−36.55	−38.67, −34.43	<0.001	−33.10	−39.73, −26.46	<0.001
Meal (medium fat and carb)	−27.90	−29.19, −26.60	<0.001	−29.06	−32.94, −25.18	<0.001
Sleep midpoint × Meal (high carb)				−0.33	−1.46, 0.80	0.565
Sleep midpoint × Meal (high fat 35 g)				−0.23	−2.77, 2.31	0.860
Sleep midpoint × Meal (high fat 40 g)				−0.58	−1.82, 0.66	0.358
Sleep midpoint × Meal (high fibre)				−1.09	−2.46, 0.29	0.121
Sleep midpoint × Meal (high protein)				0.49	−0.79, 1.77	0.455
Sleep midpoint × Meal (MCM at home)				−1.13	−3.19, 0.92	0.280
Sleep midpoint ×				0.37	−0.77, 1.51	0.525

Random effects terms for both models: intraclass correlation coefficient, 0.45; N = 953_username; N = 765_{family_id}; n observations 8395; marginal R²/conditional R² = 0.363/0.652

^aSleep midpoint is expressed in hours as a deviation from midnight

MCM, Metabolic challenge meal