Davidson 2015.

Methods	Design: individually randomized Location: Chicago, IL (USA) Time frame: June to September 2013 Sample size calculation (and outcome of focus): assumed LARC initiation immediately after abortion at 6% control and 21% intervention. To detect 15% increase in LARC initiation (from 6% to 21%) using 2‐sided alpha P = 0.05 and 80% power, 188 subjects needed (94 each arm). Due to protocol violations by interim analysis, recruited 5 additional participants
Participants	General with N: 191 participants (96 intervention; 95 control) Inclusion criteria: English‐speaking women 18 to 29 years old; presenting for surgical abortion; not desiring pregnancy in next 12 months Exclusion criteria: nonviable or anomalous pregnancy; pregnancy as result of sexual assault; not English‐speaking
Interventions	Study focus: pregnancy prevention; initiate LARC after abortion Theory or model: Transtheoretical model (assumed most women seeking abortion in precontemplation or contemplation for LARC) Intervention: 3‐segment video delivered on a tablet computer, featuring messages delivered by health care provider (segment 1) and peers (segment 2 and 3); facilitate LARC uptake by increasing awareness, helping women weigh pros and cons and gain self‐efficacy for using LARC postabortion; usual care after video as below Comparison: video of physician discussing stress management; usual care after video, including contraception and abortion counseling (all contraceptive methods discussed)
Outcomes	Primary: initiation of LARC Secondary: NA Follow‐up: NA; immediately after abortion
Notes	Not included in this review: satisfaction (and perceived autonomy) survey regarding usual care counseling for both groups (5 items); groups did not differ significantly
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated randomization (random.org); 1:1 allocation and blocks of 10
Allocation concealment (selection bias)	Low risk	Sequence entered into software (RedCap), which automatically randomized following baseline survey
Blinding of participants and personnel (performance bias) All outcomes	High risk	Counselors and clinicians blinded to study arm allocation Presume no blinding of participants; not feasible due to type of intervention
Blinding of outcome assessment (detection bias)	Low risk	No mention; initiation of LARC from medical records
Outcome measures	Low risk	Contraceptive method selection from chart review
Incomplete outcome data (attrition bias) All outcomes	Low risk	Loss to follow‐up: NA; method initiation assessed on same day as procedure Excluded after randomization: 1 did not have abortion and 1 ineligible due to age
Other bias	Unclear risk	Analysis for cluster randomized trial: NA