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Objectives: While suicidal behaviour has become less prevalent in non-manual workers in recent decades, rates have increased in manual workers. We aimed to identify occupations within the construction industry with excess risk of suicide and non-fatal self-harm. Methods: This cohort of Swedish construction workers comprises 389 132 individuals examined 1971-1993 and followed 1987-2018 using national hospital and cause of death registers. More than 200 job titles were merged into 22 occupational groups. For 296 891 men alive in 1987 and active in the construction sector, survival was calculated from baseline to first event of non-fatal self-harm or suicide and censored for emigration, long-term unemployment, disability pension, retirement, death from other causes or end of follow-up. HRs with 95% CIs were obtained from multiple Cox proportional hazard regression. Results: Overall, 1618 cases of suicide and 4774 events of non-fatal self-harm were registered. Self-harm before baseline was the single largest risk factor for suicide, HR 9.3 (95% CI 7.5 to 11.6). Compared with the overall mean, labourers and rock workers had excess risk for suicide, HR 1.4 (95% CI 1.1 to 1.7) and 1.5 (95% CI 1.0 to 2.3), respectively, while electricians, clerks and foremen had reduced risk. Labourers, concrete workers, sheet metal workers, painters, glaziers and the group € other construction workers' were at increased risk for non-fatal self-harm. Almost all categories of manual workers were at increased risk for suicidal behaviour relative to clerks and foremen. Conclusions: Specific occupations within the construction sector were associated with excess risk for suicidal behaviour. Future studies should identify underlying risk factors to inform tailored interventions.

Objective: The aim of the study was to explore perceptions of mental ill health, suicidal behaviour and working conditions among male construction workers, in order to gain an in-depth understanding of these phenomenon and to identify relevant avenues for workplace interventions. Method: Data were collected in individual and group interviews, and 43 individuals from the Swedish construction industry, workers, union representative and managers, participated in the study. Inductive thematic analysis was used to analyse the data. Results: Five main themes were found: Difficult to talk about mental health, Demanding working environment affects mental health, Substance abuse among construction workers, Importance of management, and Need for routines and social support in the workplace. Many participants reported that there was a stigma related to mental health. Suicides that had occurred among colleagues were perceived to come out of the blue. The working environment in the construction industry was perceived to have a negative effect on mental health, and it was reported that the management played an important role in both the cause and prevention of mental health problems. Conclusions: The results from this Swedish study are in accordance with previous international research regarding a macho culture, stigma of mental health and a demanding working environment in the construction industry. The study adds to existing knowledge by highlighting that suicides were perceived to be very unexpected, that poor physical health affected mental health and that many participants did not know how to deal with mental health issues in the workplace.