A survey of office workers employed by North Carolina telephone companies was conducted to determine the extent and types of health problems experienced by office workers who use video display terminals (VDTs). Data were gathered by questionnaires mailed to 2,478 office workers, with 966 responses. Questions concerning a wide range of health effects and working conditions were asked. Ninety-five percent of the respondents were women, most aged 20-40 years. Some of the results of the survey were as follows: (1) VDT users who use a VDT for more than half of their work day experienced significantly higher rates of health problems than non-VDT users, including increased rates of eyestrain; back, neck, arm, and hand pain; stress-related problems; and chronic health problems--hypertension and angina; (2) poor workstation design factors, including lack of adjustable controls for VDT screen angle, brightness, glare, and chairs providing inadequate back support, were associated with increased rates of health problems for both VDT and non-VDT office workers; (3) these health problems were further aggravated by jobs that involved low job control and/or high job demands; and (4) there was a significant relationship between angina and VDT use. Recommendations were made for improvements in the following areas: VDT and workstation design; workplace design; stress reduction; training; research; and government action. The survey instrument is included. (KC)