Forward stepwise (likelihood-ratio) multivariate logistic regression
Dichotomized total score according to the cut-off value (<40 = 0; ≥40 = 1)
§ Independent variables entered into the model: gender (man = 0, woman = 1), visit prior to MRI (No = 0, Yes = 1), telephone call prior to MRI (No = 0, Yes = 1), sedatives prior to MRI (No = 0, Yes = 1), relatives present in the MRI room (No = 0, Yes = 1), music during MRI (No = 0, Yes = 1), referral diagnosis (malignancy = 1, other disease = 0), high trait anxiety (STAI-T total score <40 = 0, STAI-T total score ≥40 = 1), group affiliation (intervention group = 0, control group = 1). Independent variables that are not presented in the table were not significantly associated with experiencing high anxiety levels.
Hosmer-Lemeshow goodness-of-fit test, P=0.601; Nagelkerke‘s pseudo R-square, 0.399 (STAI-SB);
Hosmer-Lemeshow goodness-of-fit test, P=0.371; Nagelkerke‘s pseudo R-square, 0.149 (STAI-SA).
B, regression coefficient; SE, standard error; 95% CI, 95% confidence interval; MRI, magnetic resonance imaging; STAI-SB, state anxiety before scanning; STAI-SA, state anxiety during scanning