Table 1.
ATBC Study participants with dietary vitamin C intake <90 mg/day by dietary vitamin E intake.
| Dietary vitamin E intake | Test of trendaP | |||
|---|---|---|---|---|
| Range (mg/day) | 1.4–8 | 9–11 | 12–58 | |
| Median intake (mg/day) | 6.5 | 10.1 | 15.3 | |
| Vitamin E supplement effectb RR (95% CI) |
1.03 (0.92–1.16) |
0.92 (0.73–1.15) |
1.01 (0.81–1.26) |
0.5 |
| Deaths (vitE/no-vitE) | 588/579 | 147/157 | 160/156 | |
| N | 8740 | 2483 | 2344 | |
a
Test of interaction between vitamin E supplement effect and dietary vitamin E intake as a continuous variable. The linear trend was tested and the p > 0.05 value indicates that there is no evidence that the vitamin E supplement effect varies by dietary vitamin E intake level.
b
The Cox regression model comparing participants who received vitamin E with those who did not. For the 11,223 participants who had dietary vitamin E intake below 12 mg/day (median 7.1 mg/day), which is the EAR level for ages 51 years and older [(1), p 238], the RR = 1.00 (95% CI 0.91–1.11).
RR, risk ratio; CI, confidence interval.