BACKGROUND: Modern society work implies computer-based activities generating back pain because of prolonged sitting positions and non-ergonomic postures. OBJECTIVE: The aim of the study was to analyse the back-pain characteristics in a group of office workers in comparison with potential risk factors. METHODS: The design of the study was retrospective; a group of 109 computer workers with back pain was selected from a private physiotherapy unit between Jan 2018 - Dec 2019. Anthropometric, occupational and behaviour data, symptoms, the diagnosis on the first visit, previous medical diagnosis and specific physical activities were collected from medical records. RESULTS: The studied group (research sample) is formed of information technology operators, engineers and economists, had the mean age 38.91±10.25, with 14.04±9.12 years seniority at work. Most of them addressed to the physiotherapist directly, or they were referred by their family physician; 60% had MRI investigation on the first physiotherapy visit with no medical referral or diagnosis. The symptoms were not reported to the occupational physician. The back pain appeared independent of BMI; the low back pain had higher prevalence in males. Patients reported 6 months of back pain in 57,8% of all cases. The pain was favoured by continuous activity, more than 4 hours, in the sitting posture. CONCLUSIONS: A complex and interdisciplinary team that included an occupational physician, an ergonomist and a physiotherapist could prevent and control back pain in computer workers. Workplace conditions adaptation, proper physiotherapy and periodical medical check-ups could improve the health status of these workers.