The reasons of poisoning were mainly caused by suicide (93.5%), accidents accounted for only 6.5%, due to carelessness while spraying, drink mistaken.
Nguyên nhân ngộ độc chủ yếu do tự tử (93,5%), tai nạn chỉ chiếm 6,5%, do bất cẩn khi phun thuốc, uống nhầm.