Table 3. Relative risk (95% CI) for anemia at follow-up derived from Poisson regression according to quartiles of baseline riboflavin intake among Chinese adults by anemic status at baseline in Jiangsu Nutrition Study. a .
| Riboflavin intake quartiles in 2002 | P for trend | ||||
| Q1 | Q2 | Q3 | Q4 | ||
| (0.5 mg/d)b | (0.7 mg/d) | (0.8 mg/d) | (1.3 mg/d) | ||
| Non-anemic at baseline (n = 868) | |||||
| Model 1c | 1 | 1.16(0.80–1.68) | 0.83(0.53–1.31) | 0.97(0.61–1.54) | 0.571 |
| Model 2d | 1 | 1.17(0.81–1.68) | 0.84(0.53–1.33) | 1.00(0.59–1.68) | 0.663 |
| Model 3e | 1 | 1.17(0.81–1.68) | 0.80(0.50–1.28) | 1.00(0.59–1.69) | 0.621 |
| Anemic at baseline (n = 385) | |||||
| Model 1c | 1 | 0.89(0.60–1.32) | 0.61(0.38–0.97) | 0.61(0.37–1.00) | 0.020 |
| Model 2d | 1 | 0.82(0.54–1.23) | 0.57(0.35–0.93) | 0.52(0.28–0.97) | 0.017 |
| Model 3e | 1 | 0.82(0.54–1.23) | 0.56(0.34–0.93) | 0.52(0.28–0.98) | 0.021 |
a
Values are prevalence rate ratio (95% CI) from Poisson regression.
b
mean riboflavin intake with quartile.
c
Model 1 adjusted for age (years, as continuous), sex, and energy intake.
d
Model 2 adjusted for age, sex, smoking (0, 1–19, ≥20 cigarettes/day), alcohol drinking (g/day), education (low, medium, high), and occupation (manual/non-manual), overweight (BMI≥24 kg/m2, yes/no), hypertension (yes/no), intake of energy (kcal/day), iron (mg/day), and vitamin C (mg/day) (as continuous variables), and baseline dietary patterns.
e
Model 3 additional adjusted for dietary patterns (continuous) at follow-up.