Table 6.

Differences in C (or FGCMs, accordingly) concentrations in different matrices according to the season of collection (summer/autumn).

Matrices	Period						Mann–Whitney		Effect Size
	Summer			Autumn
	M	SD	N	M	SD	N	Z	p	r
Serum (V)	88.43	19.55	34	101.30	32.30	22	−1.80	0.073	−0.24
Saliva	12.61	6.82	11	12.64	5.92	18	0.02	0.982	<0.01
Faeces	23.18	9.53	24	21.86	10.88	19	−0.43	0.668	−0.07
Hair	19.24	7.90	22	35.95	10.83	21	−4.52	<0.001	−0.69