A high percentage of workers at textile and footwear plants in Vietnam suffer the side-effects of unethical treatment, according to a survey done by Hanoi Medical College in association with the Garment Medical Centre. The study said that female employees working at footwear assembly plants are prone to anaemia and endocrine problems that affect their bones, muscles and joints. This condition could be the result of repetitive arm and hand movements as well as uncomfortable sitting positions. A total of 37.9 percent of all employees in the survey suffered from headaches, and 35.9 percent experienced dizziness, respiratory problems and visual impairment. Workplace stress was reportedly suffered by 40.7 percent of garment workers and 42.1 percent of workers in other fields, and this could be linked with unethical pay conditions.