Mathias Hvidtfelt Hansen1,2, Poul Pedersen Laigaard1, Else Marie Olsen3,4, Anne Mette Skovgaard3,5, Michael Larsen1,2, Line Kessel1,2, Inger Christine Munch2,6. 1. Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark. 2. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark. 3. Institute of Public Health, University of Copenhagen, Copenhagen, Denmark. 4. Centre for Clinical Research and Disease Prevention, Capital Region, Copenhagen, Denmark. 5. National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark. 6. Department of Ophthalmology, Zealand University Hospital, Roskilde, Denmark.
Abstract
PURPOSE: To determine the myopia prevalence in a Danish cohort aged 16-17 years and its relation to physical activity and use of screen-based electronic devices. METHODS: The Copenhagen Child Cohort 2000 Eye Study is a prospective, population-based, observational study. Information about use of screen devices and physical activity was obtained using questionnaires. Myopia was defined as non-cycloplegic subjective spherical equivalent refraction ≤-0.50 D in right eye. RESULTS: We included 1443 participants (45% boys) with a median age (±IQR) of 16.6 years (±0.3). The prevalence of myopia was 25% (CI95% 23-28, n = 360) with no differences between sexes (p = 0.10). The odds ratio (OR) for myopia was 0.57 (CI95% 0.42-0.76, p = 0.0002) in participants physically active 3-6 hr/week (n = 502) and 0.56 (CI95% 0.42-0.76, p = 0.0002) if active >6 hr/week (n = 506), both compared with participants physically active <3 hr/week (n = 396). The use of screen devices >6 hr/day was associated with increased OR for myopia compared with screen device use <2 hr/day in both weekdays (OR = 1.95, CI95% 1.16-3.30, p = 0.012) and weekends (OR = 2.10, CI95% 1.17-3.77, p = 0.013). CONCLUSION: In this cohort of healthy 16-17-year olds, lower physical activity and more use of screen devices contributed significantly to the observed 25% prevalence of myopia with a roughly doubled risk of having myopia if physically active <3 hr/week or if using screen devices >6 hr/day. Our results support physical activity being a protective factor and near work a risk factor for myopia in adolescents.
PURPOSE: To determine the myopia prevalence in a Danish cohort aged 16-17 years and its relation to physical activity and use of screen-based electronic devices. METHODS: The Copenhagen Child Cohort 2000 Eye Study is a prospective, population-based, observational study. Information about use of screen devices and physical activity was obtained using questionnaires. Myopia was defined as non-cycloplegic subjective spherical equivalent refraction ≤-0.50 D in right eye. RESULTS: We included 1443 participants (45% boys) with a median age (±IQR) of 16.6 years (±0.3). The prevalence of myopia was 25% (CI95% 23-28, n = 360) with no differences between sexes (p = 0.10). The odds ratio (OR) for myopia was 0.57 (CI95% 0.42-0.76, p = 0.0002) in participants physically active 3-6 hr/week (n = 502) and 0.56 (CI95% 0.42-0.76, p = 0.0002) if active >6 hr/week (n = 506), both compared with participants physically active <3 hr/week (n = 396). The use of screen devices >6 hr/day was associated with increased OR for myopia compared with screen device use <2 hr/day in both weekdays (OR = 1.95, CI95% 1.16-3.30, p = 0.012) and weekends (OR = 2.10, CI95% 1.17-3.77, p = 0.013). CONCLUSION: In this cohort of healthy 16-17-year olds, lower physical activity and more use of screen devices contributed significantly to the observed 25% prevalence of myopia with a roughly doubled risk of having myopia if physically active <3 hr/week or if using screen devices >6 hr/day. Our results support physical activity being a protective factor and near work a risk factor for myopia in adolescents.
Authors: Alexander K Schuster; Laura Krause; Clara Kuchenbäcker; Franziska Prütz; Heike M Elflein; Norbert Pfeiffer; Michael S Urschitz Journal: Dtsch Arztebl Int Date: 2020-12-11 Impact factor: 5.594
Authors: Winnie W Y Tso; Frank Reichert; Nancy Law; King Wa Fu; Jimmy de la Torre; Nirmala Rao; Lok Kan Leung; Yu-Liang Wang; Wilfred H S Wong; Patrick Ip Journal: Lancet Reg Health West Pac Date: 2022-02-02
Authors: Gui-You Yang; Li-Hua Huang; Katrina L Schmid; Chen-Guang Li; Jing-Yi Chen; Guan-Hao He; Li Liu; Zeng-Liang Ruan; Wei-Qing Chen Journal: Int J Environ Res Public Health Date: 2020-02-07 Impact factor: 3.390