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Table 4 Visual field regression model. Ω

From: Lutein supplementation in retinitis pigmentosa: PC-based vision assessment in a randomized double-masked placebo-controlled clinical trial [NCT00029289]

Model Without 6-Week Delay Assumption With 6-Week Delay Assumption
Covariates§ Coefficient¶ (95% CI) P value Coefficient (95% CI) P value
Treatment 0.0183 (0.0010,0.0355) 0.038 0.0292 (0.0118,0.0466) 0.001
Period - - - -
Time (number of weeks) -0.0022 (-0.0034,-0.0010) <0.001 -0.0023 (-0.0034,-0.0011) <0.001
Age - - - -
Vitamin A Use 0.0937 (0.0081, 0.1793) 0.032 0.0941 (0.0080, 0.1803) 0.032
Iris color - - - -
Period × Treatment - - - -
Treatment × Time - - - -
Period × Time - - - -
Baseline Log Retinal Area 0.8965 (0.8309, 0.9621) <0.001 0.8957 (0.8297, 0.9617) <0.001
Intercept 0.1325 (0.0583, 0.2067) <0.001 0.1299 (0.0554,0.2043) 0.001
  1. Ω For description of variables and coefficients: See Table 2.
  2. ¶ The coefficient indicates the change in log (visual field area) per unit change in the covariate.