Abstract:
OBJECTIVES:To report the distribution and predictors of insulin resistance (IR) in young people presenting to primary care-based mental health services. DESIGN:Cross-sectional. SETTING:Headspace-linked clinics operated by the Brain and Mind Centre of the University of Sydney. PARTICIPANTS:768 young people (66% female, mean age 19.7±3.5, range 12-30 years). MAIN OUTCOME MEASURES:IR was estimated using the updated homeostatic model assessment (HOMA2-IR). Height and weight were collected from direct measurement or self-report for body mass index (BMI). RESULTS:For BMI, 20.6% of the cohort were overweight and 10.2% were obese. However, <1% had an abnormally high fasting blood glucose (>6.9 mmol/L). By contrast, 9.9% had a HOMA2-IR score >2.0 (suggesting development of IR) and 11.7% (n=90) had a score between 1.5 and 2. Further, there was a positive correlation between BMI and HOMA2-IR (r=0.44, p<0.001). Participants in the upper third of HOMA2-IR scores are characterised by younger age, higher BMIs and depression as a primary diagnosis. HOMA2-IR was predicted by younger age (β=0.19, p<0.001) and higher BMI (β=0.49, p<0.001), together explaining 22% of the variance (F(2,361)=52.1, p<0.001). CONCLUSIONS:Emerging IR is evident in a significant subgroup of young people presenting to primary care-based mental health services. While the major modifiable risk factor is BMI, a large proportion of the variance is not accounted for by other demographic, clinical or treatment factors. Given the early emergence of IR, secondary prevention interventions may need to commence prior to the development of full-threshold or major mood or psychotic disorders.
journal_name
BMJ Openjournal_title
BMJ openauthors
Scott EM,Carpenter JS,Iorfino F,Cross SPM,Hermens DF,Gehue J,Wilson C,White D,Naismith SL,Guastella AJ,Hickie IBdoi
10.1136/bmjopen-2018-025674subject
Has Abstractpub_date
2019-05-27 00:00:00pages
e025674issue
5issn
2044-6055pii
bmjopen-2018-025674journal_volume
9pub_type
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