. 2019 Apr 4;14(4):e0214856. doi: 10.1371/journal.pone.0214856

Table 4. Mean difference in physiological and perceived stress according to age.

	12 years			13 years			14 years			F	p	η²^a
	n	M	SD	n	M	SD	n	M	SD	F	p	η²^a
HCCs^b	65	0.82	0.87	75	1.09	0.77	28	0.87	0.67	2.09	.126	0.03
PSS^c	61	8.28	1.95	72	8.17	2.33	28	7.96	2.06	0.21	.814	0.00

^aEta square (size effect)

^bHair cortisol concentrations

^cPerceived Stress Scale