Table 3.

Occurrence and concentration of ochratoxin A (OTA), 2’R-ochratoxin A (2’R-OTA) and enniatin B (EnB) in positive serum samples divided by school year and sex

School year	Sex	n	OTA				2’R-OTA				EnB
			% > LOQ	Mean1 (ng/ml)	Median (ng/ml)	Max (ng/ml)	% > LOQ	Mean (ng/ml)	Median (ng/ml)	Max (ng/ml)	% > LOQ	Mean (ng/ml)	Median (ng/ml)	Max (ng/ml)
5	Female	165	60.6	0.059 ± 0.039	0.056	0.223	0	< ½ LOQ	< ½ LOQ	< LOQ	80.6	0.014 ± 0.013	0.010	0.093
	Male	166	69.3	0.059 ± 0.030	0.059	0.220	0	< ½ LOQ	< ½ LOQ	< LOQ	89.7	0.015 ± 0.013	0.012	0.113
8	Female	230	57.4	0.053 ± 0.030	0.053	0.178	0	< ½ LOQ	< ½ LOQ	< LOQ	80.0	0.013 ± 0.012	0.011	0.098
	Male	180	56.7	0.055 ± 0.034	0.056	0.237	1.1	0.036 ± 0.025	< ½ LOQ	0.098	61.7	0.013 ± 0.012	0.010	0.096
11	Female	219	58.0	0.053 ± 0.049	0.052	0.658	1.4	0.028 ± 0.012	< ½ LOQ	0.076	87.7	0.013 ± 0.009	0.010	0.060
	Male	136	49.3	0.050 ± 0.049	0.025	0.517	5.1	0.037 ± 0.027	< ½ LOQ	0.136	56.2	0.018 ± 0.013	0.014	0.080
	All	1096	58.7	0.055 ± 0.039	0.054	0.658	1.1	0.032 ± 0.020	< ½ LOQ	0.136	84.1	0.014 ± 0.012	0.011	0.113

Values between LOD and LOQ were replaced with ½ LOQ OTA LOQ, 0.05 ng/ml; LOD, 0.014 ng/ml; 2’R-OTA LOQ, 0.05 ng/ml; LOD, 0.014 ng/ml; EnB LOQ, 0.005 ng/ml; LOD, 0.0013 ng/ml

n number of participants, LOQ limit of quantitation

¹Mean is calculated in positive samples, excluding values < LOD (limit of detection)