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Early Life Body Size Trajectory and the Risk of Primary Open-angle Glaucoma: A Retrospective Cohort Study
Jianqi Chen1, Yuyao Ling1, Yingting Zhu1
1From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China.
Insights
Low adult body size increases primary open-angle glaucoma (POAG) risk. Maintaining a healthy weight throughout life, especially avoiding significant weight loss, is crucial for reducing POAG burden and preventing blindness.
Area of Science:
- Ophthalmology
- Epidemiology
- Public Health
Background:
- Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness worldwide.
- Existing research on the association between body mass index (BMI) and POAG yields inconsistent findings.
- Limited studies have explored the impact of early life body size trajectories on POAG risk.
Purpose of the Study:
- To investigate the association between early life body size trajectories and the risk of developing primary open-angle glaucoma (POAG).
- To examine the relationship between adult body size and POAG incidence.
- To determine the influence of body size changes from childhood to adulthood on POAG risk.
Main Methods:
- A retrospective cohort study utilizing data from 467,768 participants in the UK Biobank.
- Body size in childhood was categorized as low, average, or high relative to peers.
- Adult body size was assessed using BMI residuals, and nine distinct early life body size trajectories were defined. Cox proportional hazards models were employed to analyze POAG risk.
Main Results:
- Individuals with body size trajectories ending in low adult body size exhibited an elevated risk of POAG (e.g., low-low: HR=1.35, P<.001).
- Low body size in adulthood was consistently associated with increased POAG risk (HR=1.30, P<.001).
- High body size in adulthood was linked to a reduced POAG risk (HR=0.86, P=.037), while high childhood body size showed a slight increase in risk (HR=1.14, P=.046).
- Among individuals with low childhood body size, achieving average or high adult body size was associated with reduced POAG risk.
- Substantial weight loss to a low adult body size from a high childhood body size significantly increased POAG risk (HR=1.66, P=.003).
Conclusions:
- Low adult body size is a significant risk factor for primary open-angle glaucoma.
- Avoiding excessive weight loss, particularly from childhood to adulthood, appears critical for mitigating POAG risk.
- These findings highlight the importance of weight management throughout life for preventing POAG and its associated vision loss.
Purpose:
Primary open-angle glaucoma (POAG) is a leading cause of permanent blindness. Although body mass index (BMI) has been proposed as a factor associated with POAG, existing findings are inconsistent. Systematic investigations into early life body size trajectories and their association with POAG remain limited.
Design:
Retrospective cohort study.
Participants:
A total of 467,768 participants from the UK Biobank.
Methods:
Body size in childhood was constructed in comparison with peers and categorized as low, average, or high. Adult body size was classified based on residuals from sex-stratified regression models of BMI on age and age squared. Nine distinct early life body size trajectories were defined. Cox proportional hazards models were used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for body size and trajectories.
Main Outcome Measures:
POAG incidence.
Results:
Among 467,768 participants, individuals whose trajectories ended in low adult body size had an elevated POAG risk compared to the average-average trajectory after adjusting for all covariates (low-low: HR = 1.35, 95% CI: 1.17-1.55, P < .001; average-low: HR = 1.35, 95% CI: 1.18-1.53, P < .001; high-low: HR = 1.49, 95% CI: 1.17-1.91, P = .001). Individuals with a low body size in adulthood demonstrated an elevated risk of POAG compared to those with an average body size (HR = 1.30; 95% CI: 1.19-1.43; P < .001). In contrast, a high body size was associated with varying effects in childhood (HR = 1.14; 95% CI: 1.00-1.29; P = .046) and adulthood (HR = 0.86; 95% CI, 0.75-0.99; P = .037). In the stratified analyses based on child body sizes, participants with a low child body size who attained an average (HR = 0.79, 95% CI: 0.68-0.93, P = .004) or high (HR = 0.58, 95% CI: 0.44-0.77, P < .001) in adulthood had reduced POAG risk. Among those with high child body size, substantial weight loss to low body size in adulthood increased the risk of POAG (HR = 1.66, 95% CI: 1.19-2.32, P = .003), while moderate weight loss showed no significant risk.
Conclusions:
Low adult body size was consistently associated with an increased risk of POAG, emphasizing the importance of avoiding excessive weight loss in early life, which may be critical for reducing the POAG burden.
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