Dayhimi 2020.

Study characteristics
Methods	Study design: RCT Duration of study: the study was conducted in 2010‐2011. Country: Iran Income classification: upper‐middle‐income country in 2010‐2011 Geographical scope: Teheran, Iran Healthcare setting: Sheibani Health Care Center in Tehran
Participants	1. Age: 18‐35 years (mean age 22 years) 2. Gender: female 3. Socioeconomic background: less than adequate (52.3‐67.4%) 4. Educational background: high school graduation educational levels (64.4%) Inclusion criteria: a. 18‐35 years of age primi gravida pregnant women; b. at least elementary school educational level; c. Iranian and spoke Persian; d. with an adverse history of psychological disorders or medical diseases mimicking anxiety symptoms such as hyperthyroidism, as well as lack of severe and pathologic anxiety (based on Spielbergers questionnaire). Exclusion criteria: a. score of 10 or higher in the Beck depression scale; b. participation in other classes about pregnancy; c. disobeying study protocol (more than one session of absence in the counselling classes). Note: at baseline, the intervention and control group scores for State‐Trait Anxiety Inventory (STAI), mode section, were, respectively, 40.89 (7.59) and 40.28 (7.81). Stated purpose: to determine the effect of obstetric counselling on the anxiety of pregnant women
Interventions	Name: counselling Title/name of PW and number: 1 midwife (first author) 1. Selection: not specified 2. Educational background: MSc in midwifery 3. Training: not specified 4. Supervision: not specified 5. Incentives/remuneration: not specified Prevention type: indicated prevention – participants presented with mild and moderate anxiety at baseline, but all those with scores of higher than 10 on the Beck survey were excluded. Intervention details: counselling based on a predefined protocol, for 5 sessions in 5 weeks (a duration of 60 to 90 minutes for each session) Control: usual care (routine prenatal care)
Outcomes	Participants’outcomes of interest for this review Anxiety symptoms – STAI Carers’ outcomes of interest for this review Nil Economic outcomes Nil Time points: baseline, post‐intervention (1‐6 months)
Notes	Source of funding: none Notes on validation of instruments (screening and outcomes): the validity of the questionnaires and STAI was approved by five faculty members of the midwifery faculty of Shahid Beheshti University of Medical Sciences, a statistics consultant, and a psychologist consultant. Additional information: none Handling the data: not applicable Prospective trial registration number: not specified