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Relative frequency (prevalence) of two definitions of serum vitamin D deficiency before and after treatment with vitamin D3 injection.
| vitamin D3 injection (Total | Before treatment | 95% Confidence | After treatment | 95% Confidence | ||
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| examined N = 454) | N | % | Interval | N | % | Interval |
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| Severe vitamin D deficiency (serum conc < 10 ng/ml) | 119 | 26.2 | (22.3 to 30.4) | 17 | 3.7 | (2.3 to 5.8) |
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| vitamin D deficiency (serum conc < 20 ng/ml) | 378 | 83.3 | (79.6 to 86.5) | 187 | 41.2 | (36.7 to 45.8) |
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