Table 4.

Associations Between Breast Milk and Infants’ Saliva GC Concentrations per 3-Hour Time Interval

	Cortisol		Cortisone
Time Interval (n)	β (95%CI)	P	β (95%CI)	P
0:00 am–3:00 am(20/21)	–0.1 (–0.4 to 0.1)	0.35	–0.3 (–0.9 to 0.2)	0.21
3:00 am–6:00 am (23)	0.2 (–0.1 to 0.5)	0.23	0.3 (–0.1 to 0.7)	0.14
6:00 am–9:00 am (42)	0.2 (0.03 to 0.5)	0.03	0.7 (0.1 to 1.3)	0.03
9:00 am–12:00 pm (54/52)	0.0 (–0.3 to 0.3)	0.96	0.0 (–0.6 to 0.6)	0.94
12:00 pm–15:00 pm (44)	0.1 (–0.04 to 0.3)	0.11	0.6 (–0.1 to 1.3)	0.09
15:00 pm–18:00 pm (43)	–0.1 (–0.7 to 0.5)	0.78	–0.1 (–0.8 to 0.7)	0.88
18:00 pm–21:00 pm (39)	0.1 (–0.7 to 1.0)	0.78	–0.2 (–1.4 to 1.0)	0.69
21:00 pm–24:00 pm (35)	–0.3 (–1.4 to 0.7)	0.51	–0.3 (–1.6 to 1.0)	0.63

Values represent β (95% CI) as analyzed with linear mixed models, while adjusting for intra-individual measurements.

Abbreviations: CI, confidence interval.