Sample of patients
anxiety
The inclusion criteria for the RCT study were as follows: (i) self-reported dental anxiety at a level of severity that affected the participant’s ability to receive dental treatment, and (ii) the ability to communicate fluently in Norwegian. The patients were mainly self-referred (In the present study, sample size calculations were done with a significance level of 0.05 (α = 0.05) and a power set to 0.8 (β = 0.20). Sample size was estimated from the DAS values among patients with dental anxiety but without diagnosed odontophobia reported in a Norwegian study conducted by Kvale and colleagues [