Studies investigating the relationship between cigarette smoking and prolactin secretion in the general population have yielded inconsistent results. Many antipsychotic drugs increase prolactin secretion, but there are no published studies that have investigated the relationship between smoking and prolactinaemia in antipsychotic-treated patients. We obtained prolactin levels from 228 antipsychotic-treated patients in secondary care mental health services and investigated the relationship between prolactinaemia and cigarette smoking. Twenty-three percent (n = 52) of patients had hyperprolactinaemia. Patients prescribed typical or a combination of typical and atypical antipsychotics had a significantly higher prevalence of hyperprolactinaemia and higher mean prolactin concentration. Both current and ex-cigarette smokers had significantly lower mean prolactin levels and a lower prevalence of hyperprolactinaemia, but after controlling for potentially confounding variables, only current smoking status was a significant predictor of lower prolactin levels (OR 2.3, 95% CI 1.2 to 4.7, p = 0.002). In this preliminary, cross-sectional study, there was a robust statistical relationship between cigarette smoking and prolactinaemia. The mechanism(s) underpinning this association needs further investigation.
133 Background: Survival in prostate cancer is increasing due to advances in hormonal therapy. The recommended duration of Androgen Deprivation Therapy (ADT) is 18 months or more for patients with Non-Metastatic (NM) high risk disease, and lifelong in Metastatic disease. ADT is, however, an independent risk factor for osteoporosis, a disease characterised by low Bone Mineral Density (BMD) and subsequent increased risk of fractures, which can lead to significant disability and early death. In patients with advanced prostate cancer, it is therefore recommended that BMD is assessed yet there remains no established national guidance on how bone health should be managed. Methods: In total, 515 case notes for patients with newly diagnosed advanced hormone sensitive prostate cancer were retrospectively reviewed for assessment of bone health management. Our data analysis included a comparison of outcomes between patient cohorts managed at a dedicated Cancer Bone Health Unit (CBHU) and the Northern centre for Cancer Care (Oncology Centre, OC). Results: 1) Baseline characteristics: The cohorts were well balanced in terms of age and cancer stage. Data was available for 410 patients in the CBHU and 105 in the OC. Median age was 75 (range 59-94) in the CBHU and 71 (range 46-86) in the OC. The majority of patients had metastatic disease and were therefore receiving lifelong ADT. 2) Fracture incidence: was consistently higher in the OC (p<0.001). The most common fractures were hip, spine and wrist. Median time to first fracture in the CBHU was 112 (range 2 to 240) vs 83 weeks (8 to 229) in the OC (p=0.252). 3) Survival: for all patients 2 years after ADT commenced was 96.7% in the CBHU vs 91.8% in the OC (HR 0.321, 95% CI 0.19-0.55, p<0.001). Median survival has not yet been reached. Conclusions: This comparative analysis suggests that a strategy of standardised bone health management within a CBHU is associated with reduced fracture incidence and may delay time to first fracture compared with clinician discretion in an OC. Additionally the data suggests that this strategy also improves survival at 2 years in patients with NM high risk disease. Bone health strategies for prostate cancer should be implemented within hospital trusts to provide standardised care across the region. This could reduce costs associated with fractures and improve quality of life for patients who avoid fractures through timely introduction of treatment. The Northern Cancer Alliance (NCA) has recently approved guidance on the management of bone health in prostate cancer, and implementation has since commenced.
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