Objective:
Autonomous cortisol secretion and possible autonomous cortisol secretion (ACS/pACS) is associated to an increase of cardiovascular risk factors such as hypertension, diabetes mellitus and dyslipidaemia. The prevalence of smoking, another well-established risk factor for cardiovascular disease, has to our knowledge, not been studied in detail in people with ACS or adrenal incidentalomas.
Methods:
Patients with adrenal incidentalomas were examined with the 1-mg overnight dexamethasone suppression test (cortisolONDST). Information about current smoking was collected from the patient’s records.
Results:
We studied 1044 patients of whom 370 (35 %) were current smokers. Of these, 22 % had bilateral adrenal incidentalomas compared to 12 % of the non-smokers (p<0.001). Among patients with unilateral adrenal incidentalomas, smokers had larger adrenal incidentalomas than non-smokers (22 mm vs. 19 mm, p<0.001). Smokers also more often had cortisolONDST ≥50 nmol/l than non-smokers, 54 % vs. 40 % (p<0.001), a finding independent of the size of the adrenal incidentalomas in patients with unilateral adrenal incidentalomas.
Conclusions:
In the present study of patients with adrenal incidentalomas, the prevalence of current smoking was higher than in the general population. Furthermore, smokers had larger unilateral adrenal incidentalomas, more often bilateral adrenal incidentalomas, and more frequently ACS/pACS. Whether smoking is a risk factor for adrenal incidentalomas and ACS/pACS or our findings are due to case selection, needs to be further studied.