Background Men comprise nearly two-thirds of trafficked and forced labourers in common low-skilled labour sectors including fishing, agriculture and factory work. Yet, most evidence on human trafficking has focused on women and girls trafficked for sex work, with scant research on trafficked men and boys. Methods We analyse survey data from the largest systematic consecutive sample of trafficked people collected to date to describe the prevalence of violence, occupational health risks and injuries and associated factors. Participants were labour-trafficked men and boys using posttrafficking support services in Thailand, Cambodia and Vietnam. Findings Data are presented on 446 males aged 10-58. Men and boys were mainly trafficked for fishing (61.7%), manufacturing (19.1%) and begging (5.2%). Fishermen worked extensive hours (mean 18.8 hours/day, SD 5.9) and factory workers worked on average 11.9 hours/ day (SD 2.9). 35.5% of male survivors had been injured while trafficked; 29.4% received no personal protective equipment (e.g. gloves). The most commonly reported injuries among all males were deep cuts (61.8%) and skin injuries (36.7%), injuries for which fewer than one-quarter reported receiving medical care. Six fishermen lost body parts, none of whom received medical care. Most males (80.5%) had no or very few rest breaks. One-third (37.8%) experienced severe violence. Work-related injuries were associated with severe violence (AOR 3.44, CI:1.63-7.26), being in the fishing sector, (AOR 4.12, CI:2.39-7.09) and threats (AOR 2.77, CI:1.62-4.75). Experiencing any violence was associated with threats (AOR 26.86, CI:14.0-51.23), being in the fishing sector (AOR 18.53, CI:8.74-39.28) and fluency in language of destination country (AOR 0.39, CI:0.20-0.75). Conclusion This study highlights the abuse and extreme occupational hazards suffered by trafficked men and boys. Occupational health and safety interventions are urgently needed to protect male migrant labourers working in high-risk sectors, particularly fishing. © 2016 Pocock et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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protective equipment Cambodia Thailand human middle aged statistics and numerical data communication skill manufacturing industry Surveys and Questionnaires Young Adult migrant worker Humans fishing occupational accident Adolescent classification Occupational Injuries male Southeast Asia Viet Nam occupational safety questionnaire skin injury prevalence human trafficking Article working time workplace violence Child Abuse adult occupational health threat occupational hazard Asia, Southeastern Child