Table 3

Serum 4-HPR, 4-MPR, and retinol levels for trial participants at 6-month visit

Treatment arm4-HPR (ng/ml) Mean (95% CI)a4-MPR (ng/ml) Mean (95% CI)Retinol (ng/ml) Mean (95% CI)
4-HPR34.8 (22.4–47.3)53.1 (37.3–68.9)453.3 (406.9–499.7)
Placebo00615.4 (576.6–654.1)
  • a CI, confidence interval.