Table IV.

Multiple variable linear regression analyses predicting uncertainty.

	Outcome variable
	Total scale	Subscales
Predictor variable	Uncertainty B CI	Ambiguity B CI	Lack of clarity B CI
Perceived personal control (1 – 7)	−4.044b −5.245 – −2.844	−1.642b −2.293 – −0.990	−1.441b −1.924 – −0.964
Optimism (0 – 24)	−0.477a −0.884 – −0.070	−0.290c −0.509 – −0.070	−0.231c −0.388 – −0.074
Disease severity (1 – 7)	1.797a 0.314 – 3.279	1.377b 0.589 – 2.165	—

Table includes all predictor variables that remained in the model after backwards step elimination. The confounding variables respondent's age, country of residence, highest education completed, and whether respondent is in a committed relationship are included as covariates in all models. Data not shown because relationships were not statistically significant. B, unstandardized regression coefficient, CI, 95% confidence interval.

^aP≤0.05,

^bP≤0.001,

^cP≤0.01