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Table 3 Summary of scales included in the questionnaire to measure confidence and knowledge

From: Development and evaluation of training resources to prepare health professionals for counselling pregnant women about non-invasive prenatal testing for Down syndrome: a mixed methods study

Measure Description Items Reliabilitya Range Q1 Mdn (IQR) Q3 Mdn (IQR) Outcome
Self-perceived confidence scale Clinical scenario given. Confidence felt in discussing features of NIPT. 13 items, 4 point Likert scales 0.95 0 – 39 7 (9) 23 (3) Statistically significant improvement in self-perceived confidence p < 0.001
Self-perceived knowledge scale Self-perceived knowledge regarding features of NIPT 6 items, 4 point Likert scales 0.92 0 – 18 1 (3) 8 (4) Statistically significant improvement in self-perceived knowledge p < 0.001
Knowledge Test Knowledge of cffDNA, features of NIPT, care pathway for NIPT 8 items, True, false, unsure 0.81 0 – 8 2 (4) 6 (2) Statistically significant improvement in knowledge test p < 0.001
  1. aReliability was assessed using Cronbach’s alpha for Likert scales and Kuder-Richardson 20 Formula for dichotomous questions