Table 3

Constipation: probability estimates of adverse event occurring and mean ratings of Likert scale variables as a function of mode of presentation (verbal or numerical)

Verbal (“common”)Numerical (“2.5%”)95% CI of differencet valuep value
Probability of occurrence (%)34.28.115.1 to 37.04.78<0.001
Likert scale variables (possible scores 1–6)
    Likelihood of occurrence4.22.60.7 to 2.43.80<0.001
    Perceived risk to health3.22.30.4 to 1.82.080.041
    Satisfaction with information3.44.2−0.3 to 1.61.920.059
    Severity of side effect3.22.8−0.5 to 1.30.860.393
    Effect on decision to take medicine3.82.60.7 to 2.22.140.037