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Table 2 Prospective relationship between LAN at baseline and risk of developing obesity at follow-up among non-obesity participants at baseline (N = 190,204)

From: A large prospective investigation of outdoor light at night and obesity in the NIH-AARP Diet and Health Study

Obesity at Follow-up LAN in 1996 p-for-trend
Q1 Q2 Q3 Q4 Q5
LAN, nW/cm2/sr (Median, Range) 5.3 (0.7, 9.6) 14.2 (9.7, 20.2) 27.2 (20.3, 35.1) 44.6 (35.2, 57.0) 73.8 (57.1, 220.7)  
Overall
 No. (%) 3086 (8.3) 3109 (8.1) 3211 (8.1) 3128 (8.1) 3163 (8.8)  
OR (95%CI)
 Model 1 ref 0.98 (0.93, 1.04) 1.02 (0.97, 1.08) 1.02 (0.96, 1.08) 1.08 (1.02, 1.15) 0.001
 Model 2 ref 1.02 (0.96, 1.10) 1.11 (1.03, 1.19) 1.11 (1.03, 1.20) 1.15 (1.05, 1.25) 0.001
Men (N = 114,305)
 No. (%) 1798 (7.7) 1806 (7.5) 1887 (7.8) 1696 (7.4) 1601 (8.1)  
 OR (95%CI)
 Model 1 ref 0.95 (0.88, 1.02) 1.04 (0.96, 1.12) 1.00 (0.93, 1.08) 1.12 (1.03, 1.21) < 0.001
 Model 2 ref 0.98 (0.90, 1.07) 1.11 (1.01, 1.22) 1.07 (0.96, 1.18) 1.12 (1.00, 1.25) 0.04
Women (N = 75,899)
 No. (%) 1288 (9.2) 1303 (9.0) 1324 (8.7) 1432 (9.0) 1562 (9.6)  
OR (95%CI)
 Model 1 ref 1.03 (0.94, 1.13) 1.00 (0.91, 1.09) 1.04 (0.96, 1.14) 1.05 (0.96, 1.15) 0.24
 Model 2 ref 1.08 (0.97, 1.20) 1.10 (0.98, 1.23) 1.17 (1.04, 1.33) 1.19 (1.04, 1.36) 0.01
  1. Model 1: adjusted for age, sex (for overall analysis alone), and baseline BMI
  2. Model 2: adjusted for variables in model 1, and race/ethnicity, education, baseline state, marital status, census tract median home value, poverty rate and population density
  3. Abbreviations: CI confidence interval, LAN light at night, OR odds ratio