Improving ambulatory saliva-sampling compliance in pregnant women: a randomized controlled study.

Julian Moeller, Roselind Lieb, Andrea H Meyer, Katharina Quack Loetscher, Bettina Krastel, Gunther Meinlschmidt
Author Information
  1. Julian Moeller: University of Basel, Department of Psychology, Division of Clinical Psychology and Epidemiology, Basel, Switzerland ; Diagnostic and Crisis Intervention Centre, Department of Psychiatry, University of Basel, Basel, Switzerland.
  2. Roselind Lieb: University of Basel, Department of Psychology, Division of Clinical Psychology and Epidemiology, Basel, Switzerland.
  3. Andrea H Meyer: University of Basel, Department of Psychology, Division of Clinical Psychology and Epidemiology, Basel, Switzerland.
  4. Katharina Quack Loetscher: Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.
  5. Bettina Krastel: National Centre of Competence in Research (NCCR), Swiss Etiological Study of Adjustment and Mental Health (sesam), University of Basel, Basel, Switzerland.
  6. Gunther Meinlschmidt: University of Basel, Department of Psychology, Division of Clinical Psychology and Epidemiology, Basel, Switzerland ; National Centre of Competence in Research (NCCR), Swiss Etiological Study of Adjustment and Mental Health (sesam), University of Basel, Basel, Switzerland ; Faculty of Medicine, Ruhr-University Bochum, Bochum, Germany.

Abstract

OBJECTIVE: Noncompliance with scheduled ambulatory saliva sampling is common and has been associated with biased cortisol estimates in nonpregnant subjects. This study is the first to investigate in pregnant women strategies to improve ambulatory saliva-sampling compliance, and the association between sampling noncompliance and saliva cortisol estimates.
METHODS: We instructed 64 pregnant women to collect eight scheduled saliva samples on two consecutive days each. Objective compliance with scheduled sampling times was assessed with a Medication Event Monitoring System and self-reported compliance with a paper-and-pencil diary. In a randomized controlled study, we estimated whether a disclosure intervention (informing women about objective compliance monitoring) and a reminder intervention (use of acoustical reminders) improved compliance. A mixed model analysis was used to estimate associations between women's objective compliance and their diurnal cortisol profiles, and between deviation from scheduled sampling and the cortisol concentration measured in the related sample.
RESULTS: Self-reported compliance with a saliva-sampling protocol was 91%, and objective compliance was 70%. The disclosure intervention was associated with improved objective compliance (informed: 81%, noninformed: 60%), F(1,60)  = 17.64, p<0.001, but not the reminder intervention (reminders: 68%, without reminders: 72%), F(1,60) = 0.78, p = 0.379. Furthermore, a woman's increased objective compliance was associated with a higher diurnal cortisol profile, F(2,64)  = 8.22, p<0.001. Altered cortisol levels were observed in less objective compliant samples, F(1,705)  = 7.38, p = 0.007, with delayed sampling associated with lower cortisol levels.
CONCLUSIONS: The results suggest that in pregnant women, objective noncompliance with scheduled ambulatory saliva sampling is common and is associated with biased cortisol estimates. To improve sampling compliance, results suggest informing women about objective compliance monitoring but discourage use of acoustical reminders.

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MeSH Term

Adult
Ambulatory Care
Biomarkers
Female
Humans
Hydrocortisone
Patient Acceptance of Health Care
Pregnancy
Saliva
Self Report
Specimen Handling
Stress, Psychological

Chemicals

Biomarkers
Hydrocortisone

Word Cloud

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