Background: Physical inactivity is a key contributor to the global burden of disease and disproportionately impacts the wellbeing of people experiencing mental illness. Increases in physical activity are associated with improvements in symptoms of mental illness and reduction in cardiometabolic risk. Reliable and valid clinical tools that assess physical activity would improve evaluation of intervention studies that aim to increase physical activity and reduce sedentary behaviour in people living with mental illness. Methods: The five-item Simple Physical Activity Questionnaire (SIMPAQ) was developed by a multidisciplinary, international working group as a clinical tool to assess physical activity and sedentary behaviour in people living with mental illness. Investigators from 43 centres in 23 countries collected reliability and validity data on the SIMPAQ from patients with DSM or ICD mental illness diagnoses. Test-retest repeatability was assessed one-week apart. Results: Criterion SIMPAQ validity was assessed against accelerometer-derived measures of physical activity. Data were obtained from 1,010 participants. The SIMPAQ had good test-retest reliability (Spearman rho approximately 0.70). Criterion validity for moderate-vigorous physical activity was comparable to studies conducted in general population samples. Criterion validity of the sedentary behaviour item was poor. An alternative method to calculate sedentary behaviour had greater criterion validity. This alternative method is recommended for use in future studies employing the SIMPAQ. Conclusions: The SIMPAQ is a brief measure of physical activity and sedentary behaviour that can be reliably and validly administered by health professionals.

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On 02 Jan, 2020
On 02 Jan, 2020
Received 02 Jan, 2020
Received 02 Jan, 2020
Invitations sent on 28 Dec, 2019
On 28 Dec, 2019
On 16 Dec, 2019
On 15 Dec, 2019
On 15 Dec, 2019
Posted 15 Aug, 2019
On 30 Oct, 2019
Received 21 Oct, 2019
Received 17 Oct, 2019
Received 25 Sep, 2019
On 19 Sep, 2019
On 14 Sep, 2019
On 11 Sep, 2019
Invitations sent on 03 Sep, 2019
On 08 Aug, 2019
On 07 Aug, 2019
On 07 Aug, 2019
On 15 Jul, 2019
On 02 Jan, 2020
On 02 Jan, 2020
Received 02 Jan, 2020
Received 02 Jan, 2020
Invitations sent on 28 Dec, 2019
On 28 Dec, 2019
On 16 Dec, 2019
On 15 Dec, 2019
On 15 Dec, 2019
Posted 15 Aug, 2019
On 30 Oct, 2019
Received 21 Oct, 2019
Received 17 Oct, 2019
Received 25 Sep, 2019
On 19 Sep, 2019
On 14 Sep, 2019
On 11 Sep, 2019
Invitations sent on 03 Sep, 2019
On 08 Aug, 2019
On 07 Aug, 2019
On 07 Aug, 2019
On 15 Jul, 2019
Background: Physical inactivity is a key contributor to the global burden of disease and disproportionately impacts the wellbeing of people experiencing mental illness. Increases in physical activity are associated with improvements in symptoms of mental illness and reduction in cardiometabolic risk. Reliable and valid clinical tools that assess physical activity would improve evaluation of intervention studies that aim to increase physical activity and reduce sedentary behaviour in people living with mental illness. Methods: The five-item Simple Physical Activity Questionnaire (SIMPAQ) was developed by a multidisciplinary, international working group as a clinical tool to assess physical activity and sedentary behaviour in people living with mental illness. Investigators from 43 centres in 23 countries collected reliability and validity data on the SIMPAQ from patients with DSM or ICD mental illness diagnoses. Test-retest repeatability was assessed one-week apart. Results: Criterion SIMPAQ validity was assessed against accelerometer-derived measures of physical activity. Data were obtained from 1,010 participants. The SIMPAQ had good test-retest reliability (Spearman rho approximately 0.70). Criterion validity for moderate-vigorous physical activity was comparable to studies conducted in general population samples. Criterion validity of the sedentary behaviour item was poor. An alternative method to calculate sedentary behaviour had greater criterion validity. This alternative method is recommended for use in future studies employing the SIMPAQ. Conclusions: The SIMPAQ is a brief measure of physical activity and sedentary behaviour that can be reliably and validly administered by health professionals.

Figure 1
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