Anxiety in couples undergoing IVF: evidence from E-Freeze randomised controlled trial.

STUDY QUESTION: What are the risk factors and impacts of anxiety in women and men in heterosexual couples undergoing IVF as part of a randomised trial, with a delay in embryo transfer in one arm? SUMMARY ANSWER: Duration of infertility, ethnicity, and male partner's anxiety levels were associated with women's anxiety at the start of treatment, while initial anxiety score, partner's anxiety score at embryo transfer, ethnicity, and clinic location were associated with women's anxiety levels at embryo transfer; although women undergoing IVF were more anxious than their partners for slightly different reasons, their self-reported state anxiety was not associated with achieving clinical pregnancy, nor with switching from delayed frozen embryo transfer to fresh embryo transfer in an IVF trial. WHAT IS KNOWN ALREADY: Use of IVF treatment continues to rise and patients undergoing IVF are anxious. Participating in a randomised controlled trial (RCT) with uncertainty of arm randomisation might increase their anxiety, while a delay in treatment may add further to anxiety. STUDY DESIGN SIZE DURATION: A mixed methods study was conducted using data from the multi-centre E-Freeze RCT cohort conducted across 13 clinics in the UK from 2016 to 2019. A regression analysis on anxiety scores of couples undergoing the IVF trial and a qualitative analysis of participant questionnaires were performed. PARTICIPANTS/MATERIALS SETTING METHODS: Six hundred and four couples participating in the E-Freeze trial, who had at least one useable State-Trait Anxiety Inventory (STAI) State Anxiety subscale (STAI-S) standardised self-report questionnaire for at least one of the partners, were included in the study. STAI-S scores were measured at consent for trial (T1) and again at embryo transfer (T2). Linear and log-binomial regression were used to explore the association between characteristics and STAI-S scores, and the associations between STAI-S scores and non-compliance and clinical pregnancy, respectively. Responses to the open text question were qualitatively analysed inductively using content analysis. MAIN RESULTS AND THE ROLE OF CHANCE: Women's STAI-S scores at T1 (consent) were associated with their ethnicity, duration of infertility, and their male partner's STAI-S score at T1. Women's STAI-S scores at T2 (embryo transfer) were associated with their ethnicity, location of fertility clinic, their STAI-S score at consent, and their male partner's STAI-S score at embryo transfer. The adjusted coefficient (95% CI) for women's STAI-S scores at T2 was -4.75 (-7.29, -2.20, P