Table 2. Baseline characteristics of included cross-sectional studies of T-2 toxin exposure in food samples.

Ref.	Sites	Food type	Endemic areas					Non-endemic areas
			Number of samples			T-2 toxin (ng g–1)		Number of samples			T-2 toxin (ng g–1)
			Total	Positive	PDR (%)	PDRC > 100	Average	Total	Positive	PDR (%)	PDRC > 100	Average
Luo et al. 199217	Xi'an city, Shanxi, Shandong, Jilin, Qinghai and Neimenggu provinces	Wheat	16	0	0	—	—	7	0	0	—	—
		Corn flour	67	0	0	—	—	10	—	—	—	—
Yang et al. 199518	Sichuan and Shaanxi provinces	Wheat flour	15	10	66.67	8	468.7	15	10	66.67	3	84.2
		Corn flour	8	4	50	3	276.3	7	4	57.14	0	23.9
		Rice	3	0	0	—	0	15	5	33.33	—	3.1
Sun et al. 199719	Fuyu and Shuangcheng counties	Wheat flour	10	10	100	—	278.4	5	5	100	—	40.3
		Corn flour	5	5	100	—	122.0	5	4	80	—	152.1
Feng et al. 200420	Heilongjiang province and Fuyu village	Wheat flour	27	21	77.78	7	120.64	130	80	61.53	8	58.74
		Corn flour	25	13	52.00	—	23.73	130	43	33.07	—	30.41
		Rice	130	9	6.92	—	17.2	—	—	—	—	—
Liu et al. 200421	Fengtian and Linmao villages, North East and North China areas	Wheat flour	27	21	77.78	8	120.64	130	80	61.53	12	58.74
		Corn flour	25	13	52.00	—	23.73	—	—	—	—	—
Bao et al. 200522	Nenjiang county and Shitougou village	Wheat flour	16	16	100	—	8.58	15	10	66.67	—	84.2
Sun et al. 201223	Xinghai and Tongde counties	Wheat flour	171	171	100	19	47.47	30	—	—	—	12.23
		Wheat	153	153	100	41	78.91	—	—	—	—	—