Table D
Prevalence of vitamin D intake below adequate intake (AI) using Method 1 and Method 2 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 AI
Expected values for estimate of % of population % 95% confidence interval
Minimum Maximum from to
Method 1 (add, shrink)
1 to 3 (both sexes)
22.8 31.9 21.4† 18.5 24.3
4 to 8 (both sexes)
20.0 39.0 20.8 18.3 23.3
9 to 13
Males
 20.2 26.5 20.7 17.1 24.4
Females
 38.7 47.4 35.3† 30.8 39.7
14 to 18
Males
 21.6 24.1 21.7 18.1 25.4
Females
 48.5 57.9 45.8† 41.6 50.1
19 to 30
Men
 40.1 47.4 36.4† 30.3 42.5
Women
 51.7 64.8 47.0† 41.8 52.2
31 to 50
Men
 39.8 47.9 38.5† 33.7 43.3
Women
 41.2 58.8 38.3† 33.8 42.7
51 to 70
Men
 60.8 80.0 63.7 59.2 68.3
Women
 50.1 91.3 59.9 56.1 63.6
71 or older
Men
 69.0 96.3 80.1 75.1 85.2
Women
 54.4 97.1 73.6 67.6 79.5
Method 2 (shrink, add)
1 to 3 (both sexes)
22.5 32.2 22.2† 18.8 25.6
4 to 8 (both sexes)
20.8 40.6 23.2 20.4 26.1
9 to 13
Males
 21.4 28.0 21.8 17.3 26.3
Females
 38.3 47.6 38.1† 33.1 43.1
14 to 18
Males
 22.9 25.5 22.8† 18.2 27.4
Females
 48.8 58.1 50.8 45.9 55.7
19 to 30
Men
 38.7 45.9 39.0 32.9 45.1
Women
 52.2 65.6 52.7 47.4 57.9
31 to 50
Men
 41.2 49.4 41.3 35.4 47.1
Women
 42.5 60.3 43.0 36.7 49.3
51 to 70
Men
 60.6 79.9 62.4 56.9 67.9
Women
 50.3 91.4 58.5 54.4 62.7
71 or older
Men
 69.6 96.9 80.6 76.8 84.5
Women
 55.3 98.2 74.6 68.9 80.3
† point estimate outside minimum and maximum value interval
Notes: Minimum and maximum values estimated with Method 1 using separate distributions and are combined with (1-α)*percent below AI from supplement non-users plus α*percent below AI from users, where α is percentage of supplement users. Based on assumption that all supplement users have intake at or above AI. Minimum and maximum values estimated with Method 2 using separate empirical distributions that were combined.
Source: Canadian Community Health Survey - Nutrition 2004.