Vitamin D status of psychiatric inpatients in New Zealand's Waikato region.

We first conducted a cross-tabulation of diagnosis by ethnicity, confirming a highly significant association of Maori ethnicity with schizophrenia and schizoaffective disorder in our inpatient sample (Cramer’s V = 0.415, p < 0.001, n = 102).

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Comparing ethnicities within the schizophrenia spectrum showed Maori to have a lower mean vitamin D level (34.0 + 14.3 nM, n = 34) than Europeans (41.6 + 14.1 nM, n = 15) but this difference failed to reach statistical significance (t = 1.71, p = 0.093, df = 47).

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