Abstract
There is currently limited data available within New Zealand, focusing on the prevalence of vitamin B12 deficiency and bipolar affective disorder. International evidence would suggest this is an area within heath worthwhile of further exploration. This study aims to identify if those experiencing bipolar affective disorder within a New Zealand environment, are more likely to have deficiency of vitamin B12. International literature is used as a comparison. This study is conducted using existing data from admissions to an acute admitting facility in the area serviced by the Southern District Health Board (SDHB) of New Zealand.
A chart audit conducted as part of an evaluative design, uses retrospective admission data to an inpatient mental health unit, over a three-year period. For that period, electronic health information of those admitted with a primary diagnosis of bipolar affective disorder was collected. Corresponding laboratory results obtained inform firstly if Vitamin B12 had been assessed, and secondly to what degree deficiency is detected. Further variables were used to provide useful background knowledge.
Preliminary findings found low rates of serum vitamin B12 screening. Of the 47% tested; deficiency indicated for 0.9%, borderline levels for 22% and normal range for 77%. At risk groups were identified as those aged over 50 years, with lower rates detected amongst Māori. Limitations including lack of routine screening and concurrent unified internationally recognised reference ranges was reflected in overall findings. Recommendations for future methods of data collection and further expanded research opportunities are identified.