out in Microsoft Excel and the function from the library and ‘gamm’ ‘mcgv’26 the statistical software RStudio version 0.99.47327 was used to model the data. Role of the funding source The funder had no role in study design, data collection, data analysis, data interpretation, or writing of the report. The corresponding author had full access to all the data in the study and had final responsibility for the decision to submit for publication. Results There were 4,550 physical assaults across the study period: 2,916 were patient-toward-staff assaults and 1,634 patient-toward-patient. Assaults related to smoking accounted for 4.9% of the overall violence. Over the study period, 747,338 occupied bed days of care were delivered to patients. The characteristics of patients were: 57% (n=10,269) male; 60% (n=10,813) under 45 years of age; 40% (n=7180) had a primary diagnosis of schizophrenia or related disorder (ICD-10, F20-29), 20% (n=3,598) a mood disorder (F.30-39) and the remainder other diagnoses e.g. dementia, addiction disorder; 44% (n=8,007) were formally detained under mental health legislation. Excluding patients who had smoking status missing, 78% (11,779/15,128) were current smokers. Figure 1 shows the number of assaults per month over the duration of the study. It shows considerable monthly variation throughout, but suggests a reduction after the introduction of the smoke-free policy. Table 1 shows the results of the partly-adjusted and parsimonious GAMM models used to estimate the IRR for the change in number of assaults per month after the introduction of the smoke-free policy. Insert figure 1 about here please Insert table 1 about here please The results adjusted for all significant confounders suggest there was a 39% reduction in the number of violent assaults per month overall in the period
out in Microsoft Excel and the function ‘gamm’ from the library ‘mcgv’26 and the statistical software RStudio version 0.99.47327 was used to model the data. Role of the funding source The funder had no role in study design, data collection, data analysis, data interpretation, or writing of the report. The corresponding author had full access to all the data in the study and had final responsibility for the decision to submit for publication. Results There were 4,550 physical assaults across the study period: 2,916 were patient-toward-staff assaults and 1,634 patient-toward-patient. Assaults related to smoking accounted for 4.9% of the overall violence. Over the study period, 747,338 occupied bed days of care were delivered to patients. The characteristics of patients were: 57% (n=10,269) male; 60% (n=10,813) under 45 years of age; 40% (n=7180) had a primary diagnosis of schizophrenia or related disorder (ICD-10, F20-29), 20% (n=3,598) a mood disorder (F.30-39) and the remainder other diagnoses e.g. dementia, addiction disorder; 44% (n=8,007) were formally detained under mental health legislation. Excluding patients who had smoking status missing, 78% (11,779/15,128) were current smokers. Figure 1 shows the number of assaults per month over the duration of the study. It shows considerable monthly variation throughout, but suggests a reduction after the introduction of the smoke-free policy. Table 1 shows the results of the partly-adjusted and parsimonious GAMM models used to estimate the IRR for the change in number of assaults per month after the introduction of the smoke-free policy. Insert figure 1 about here please Insert table 1 about here please The results adjusted for all significant confounders suggest there was a 39% reduction in the number of violent assaults per month overall in the period
smokefree_policy_accepted_version.docx