@article {1593853,
	title = {Importance and severity dependence of physical activity by GPS-tracked location in glaucoma patients: GPS-tracked physical activity in glaucoma},
	journal = {Am J Ophthalmol},
	year = {2021},
	month = {2021 May 13},
	abstract = {PURPOSE: To quantify the association of visual field (VF) damage on physical activity away-from-home, per away-from-home excursion, and at home. DESIGN: Prospective cohort study. METHODS: Among 229 participants with glaucoma or suspected glaucoma, severity of VF damage was defined as average sensitivity within the integrated VF (IVF). Participants wore accelerometers and GPS trackers for seven days to measure physical activity and characterize activity location. Multivariable negative binomial regressions were used to test whether away-from-home activity per day, physical activity per away-from-home excursion, and at home activity per day varied by severity of VF damage. RESULTS: Each 5-dB decrement in IVF sensitivity was associated with a lower amount of away-from-home activities per day [18\% less Moderate \&amp; Vigorous Physical Activity (MVPA) minutes/day, 95\% CI, 0.69 to 0.97], and physical activities per away-from-home excursion (20\% less MVPA minutes/excursion, 95\% CI, 0.65, 0.98). Similar findings were noted for other away-from-home activity measures (including active minutes/steps per day, or active minutes/steps per excursion). However, worse IVF sensitivity was not associated with measures of at home activities (MVPA minutes/day, active minutes/day, and steps/day), time spent at or away from home, or excursions/week (p\&gt;0.1 for all). CONCLUSIONS: Restriction of physical activity in more severe glaucoma patients results mostly from activity restriction outside home environment. These findings highlight the importance of maintaining a safe home environment (where activity is less restricted) and increasing confidence to perform activity, particular high intensity activity, when leaving the home amongst patients with glaucoma.},
	issn = {1879-1891},
	doi = {10.1016/j.ajo.2021.04.032},
	author = {E, Jian-Yu and Mihailovic, Aleksandra and Garzon, Catalina and Schrack, Jennifer A and Li, Tianjing and West, Sheila K and Friedman, David S and Gitlin, Laura N and Ramulu, Pradeep Y}
}
