A total of 5,440 doctors – 16% of the 34,188 working in the field – responded to the “acceleration” survey. In the “peak” survey, 3,896 professionals subsequently responded and 3,079 to the “deceleration” survey. Survey results, released early as a pre-print study and not yet peer-reviewed, put the prevalence of psychological distress at 44.7% of respondents in the build-up to the first wave’s peak, 36.9% at the peak and 31.5% as it declined. Prevalence of trauma was found among 23.7% of respondents at the first pandemic peak, and 17.7% as it decelerated. Probable post-traumatic stress disorder was also found in 12.6% of respondents at the peak and 10.1% afterwards, the research suggested. The study also found that “worry of family infection due to clinical work” was most strongly associated with both distress and trauma.