Table 5
Prevalence of vitamin C intake below estimated average requirement (EAR) using Method 3 and Method 4 for combining intake from food/beverages and supplements, by age group and sex, household population aged 1 or older, Canada excluding territories, 2004
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| Below EAR | |||||
|---|---|---|---|---|---|
| Expected values for estimate of % of population | % | 95% confidence interval | |||
| Minimum | Maximum | from | to | ||
| Method 3 (divide, add, shrink) | |||||
|
1 to 3 (both sexes)
|
F | F | F | … | … |
|
4 to 8 (both sexes)
|
F | F | F | … | … |
|
9 to 13
|
|||||
|
Males
|
F | F | F | … | … |
|
Females
|
F | F | F | … | … |
|
14 to 18
|
|||||
|
Males
|
6.0E | 7.1E | 6.2E* | 3.4 | 9.1 |
|
Females
|
4.8E | 5.6E | 5.2E* | 2.7 | 7.7 |
|
19 to 30
|
|||||
|
Men
|
9.9E | 13.1E | 10.5E | 5.0 | 16.0 |
|
Women
|
10.4E | 10.7E | 10.8E† | 6.2 | 15.4 |
|
31 to 50
|
|||||
|
Men
|
18.5 | 23.5 | 19.0 | 14.1 | 23.9 |
|
Women
|
12.8 | 19.7 | 13.3 | 9.7 | 16.8 |
|
51 to 70
|
|||||
|
Men
|
18.5 | 24.8 | 18.8 | 15.1 | 22.6 |
|
Women
|
11.4 | 14.5 | 11.7* | 8.5 | 14.8 |
|
71 or older
|
|||||
|
Men
|
25.8 | 32.7 | 26.7 | 22.1 | 31.3 |
|
Women
|
15.2 | 20.4 | 15.4 | 12.0 | 18.7 |
| Method 4 (divide, shrink, add) | |||||
|
1 to 3 (both sexes)
|
F | F | F | … | … |
|
4 to 8 (both sexes)
|
F | F | F | … | … |
|
9 to 13
|
|||||
|
Males
|
F | F | F | … | … |
|
Females
|
F | F | F | … | … |
|
14 to 18
|
|||||
|
Males
|
8.5E | 10.0E | 8.5E | 3.6 | 13.4 |
|
Females
|
4.6E | 5.4E | 4.6E* | 2.0 | 7.3 |
|
19 to 30
|
|||||
|
Men
|
10.8E | 13.8E | 11.1E | 4.7 | 17.4 |
|
Women
|
10.5E | 10.6E | 10.5E* | 5.9 | 15.0 |
|
31 to 50
|
|||||
|
Men
|
18.8 | 23.8 | 19.2 | 13.1 | 25.3 |
|
Women
|
13.4 | 20.3 | 13.6 | 9.8 | 17.4 |
|
51 to 70
|
|||||
|
Men
|
18.5 | 25.4 | 18.7 | 15.1 | 22.2 |
|
Women
|
11.6 | 14.5 | 11.7* | 8.7 | 14.7 |
|
71 or older
|
|||||
|
Men
|
25.1 | 33.1 | 25.9 | 21.3 | 30.6 |
|
Women
|
15.1 | 20.2 | 15.1 | 11.3 | 19.0 |
|
† point estimate outside minimum-maximum value interval * significantly different from estimate for Method 1 E use with caution (coefficient of variation 16.6% to 33.3%) F too unreliable to be published ... not applicable Notes: Minimum and maximum values for Method 3 estimated with Method 1 using separate distributions and are combined with (1-α) multiply by percent below EAR from non-users plus α multiply by percent below EAR from users, where α is percentage of supplement users. Based on assumption that all supplement users meet EAR. For those not taking supplements, maximum value represents highest possible percentage below EAR. Minimum and maximum values for Method 4 estimated with Method 2 using separate empirical distributions that were combined. Source: Canadian Community Health Survey - Nutrition 2004. |
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