In the multivariable analysis, compared with statements describing cognition, statements about survival (OR 2.50, 95% CI 1.01–6.18, p = 0.048) and physical function (OR 3.22, 95% 1.77–5.86, p < 0.001) were more likely to be probabilistic. Statements concerning physical function were less likely to be uncertainty-based than statements about cognition (OR 0.34, 95% CI 0.17–0.66, p = 0.002). There was no significant difference in the proportion of probabilistic statements about survival compared with physical function or the proportion of uncertainty statements about survival compared with cognition or physical function. OR = odds ratio.