RT Journal Article
SR Electronic
T1 Visual impairment and objectively measured physical activity and sedentary behaviour in US adolescents and adults: a cross-sectional study
JF BMJ Open
JO BMJ Open
FD British Medical Journal Publishing Group
SP e027267
DO 10.1136/bmjopen-2018-027267
VO 9
IS 4
A1 Lee Smith
A1 Sarah E Jackson
A1 Shahina Pardhan
A1 Guillermo Felipe López-Sánchez
A1 Liang Hu
A1 Chao Cao
A1 Davy Vancampfort
A1 Ai Koyanagi
A1 Brendon Stubbs
A1 Joseph Firth
A1 Lin Yang
YR 2019
UL http://bmjopen.bmj.com/content/9/4/e027267.abstract
AB Objectives To compare levels of physical activity and sedentary time in a representative sample of US adolescents and adults with and without visual impairment.Design Cross-sectional analyses were carried out using data from the National Health and Nutrition Examination Survey.Participants The study population consisted of 6001 participants (adolescents n=1766, adults n=4235). The present analysis aggregated data from 2003 to 2004 and 2005–2006.Measures Objective physical activity and sedentary behaviour assessment was conducted over 7 days. Distance visual acuity was measured for each eye in all participants 12 years and older. Participants’ vision was categorised as: normal vision, uncorrected refractive error, non-refractive visual impairment. We estimated the sex-specific linear associations between presenting vision and objectively measured physical activity and sedentary patterns using adjusted generalised linear models in adolescents and adults.Results and conclusions Adolescents with uncorrected refractive error and non-refractive visual impairment did not accumulate higher levels of sedentary time or lower levels of moderate-to-vigorous physical activity (MVPA) compared with those with normal vision. We observed no association between vision status and accelerometer measured MVPA in adults aged 20–49 years. We observed more time spent sedentary among females 20–49 years old with non-refractive visual impairment compared with those presenting normal vision (mean difference 329.8 min/week, 95% CI: 12.5 to 647.0). Adults 50 years and older with non-refractive visual impairment appeared to accumulate less lifestyle physical activity, particularly in women (mean difference −82.8 min/week, 95% CI: −147.8 to −17.8). Adult women with non-refractive visual impairment have lower levels of lifestyle physical activity and higher levels of sedentary time than those with normal vision. Taken together, these findings highlight the need for interventions to promote physical activity and reduce sedentary time in adult populations with visual impairment, specifically adult women.