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Table 4 Comparison of score changes between two groups

From: A behavioral strategy to minimize air pollution exposure in pregnant women: a randomized controlled trial

  Intervention (N = 53) Control (N = 51)  
  Mean changea (SD) Mean changea (SD) Pb
Perceived benefits 2.04 (4.16) 0.272 (3.67) 0.003
Perceived barriers −4.42 (5.02) −2.61 (5.51) 0.10
Self-efficacy 3.35 (3.34) −0.22 (2.5) 0.0001
  1. aFollow-up score minus baseline score
  2. bDerive from Mann–Whitney U test