The RETHINK Study: Could pain catastrophising explain why some women are more likely to attend hospital during the latent phase of labour

Objective: To examine the prevalence of pain catastrophising and identify whether it impacts on the timing of hospital admission when in labour.Methods: A longitudinal cohort study. Nulliparous women, experiencing an uncomplicated pregnancy in England, were recruited between 25 and 33 weeks gestation. Participants completed two online questionnaires, (1) on recruitment, including the Pain Catastrophizing Scale (PCS) and the Wijma Delivery Expectancy Questionnaire (WDEQ-A) (2) at three weeks postnatal.Results: A total of 389 eligible participants entered the study. The percentage of women who were pain catastrophisers (PCS >= 20) was 28.1 %, while 7.6 % had a high pain catastrophising score (PCS >= 30). There was no association between pain catastrophising and the timing of hospital admission. The percentage of women reporting fear of childbirth (WDEQ-A score of >= 85) was 10.6 %. Fear of childbirth was highly associated with PCS scores (p <.001) at both the lower (>= 20) and higher (>= 30) thresholds.Conclusion: Although not statistically significant, there was a tendency for women who pain catastrophise to present to hospital in the latent phase. The highly significant association between PCS and WDEQ-A scores has implications for the identification of these women and suggests that the PCS can be used as a screening tool to identify those women who have heightened fear around pain and who may also go on to develop clinically relevant fear of childbirth. Further studies are needed to confirm the acceptability of the PCS as a screening tool with women.