Table E
Prevalence of vitamin D intake below adequate intake (AI) 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 AI
Expected values for estimate of % of population % 95% confidence interval
Minimum Maximum from to
Method 3 (divide, add, shrink)
1 to 3 (both sexes) 22.8 31.9 23.1 19.5 26.6
4 to 8 (both sexes) 20.0 39.0 20.4 16.9 23.9
9 to 13
Males 20.2 26.5 20.3 15.5 25.1
Females 38.7 47.4 39.1 33.3 45.0
14 to 18
Males 21.6 24.1 21.9 17.4 26.3
Females 48.5 57.9 49.6 44.5 54.7
19 to 30
Men 40.1 47.4 40.4 33.7 47.0
Women 51.7 64.8 52.6 46.6 58.5
31 to 50
Men 39.8 47.9 40.2 33.8 46.5
Women 41.2 58.8 42.3 34.8 49.8
51 to 70
Men 60.8 80.0 64.9 60.1 69.7
Women 50.1 91.3 57.6 53.1 62.2
71 or older
Men 69.0 96.3 80.1 75.7 84.4
Women 54.4 97.1 75.9 72.1 79.8
Method 4 (divide, shrink, add)
1 to 3 (both sexes) 22.5 32.2 22.9 19.4 26.4
4 to 8 (both sexes) 20.8 40.6 21.7 18.3 25.2
9 to 13
Males 21.4 28.0 21.8 16.5 27.1
Females 38.3 47.6 38.9 33.5 44.2
14 to 18
Males 22.9 25.5 23.2 18.3 28.1
Females 48.8 58.1 50.1 45.3 54.9
19 to 30
Men 38.7 45.9 39.4 33.4 45.3
Women 52.2 65.6 53.0 47.6 58.4
31 to 50
Men 41.2 49.4 42.1 35.6 48.5
Women 42.5 60.3 44.0 35.8 52.2
51 to 70
Men 60.6 79.9 64.0 58.8 69.3
Women 50.3 91.4 58.1 53.5 62.7
71 or older
Men 69.6 96.9 80.4 76.5 84.2
Women 55.3 98.2 77.0 73.3 80.7
Notes: Minimum and maximum values for Method 3 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 for Method 4 estimated with Method 2 using separate empirical distributions that were combined.
Source: Canadian Community Health Survey - Nutrition 2004.