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Table 1 Outcome measures and methods of analysis

From: MObile Technology for Improved Family Planning Services (MOTIF): study protocol for a randomised controlled trial

Outcome

Outcome measure

Method of analysis

1. Primary

  

Use of an effective modern method of contraception at 4 months

Self-report (binary)

Chi-squared test

Objectivea (binary)

2. Secondary

  

Pregnancy

Self-report (binary) (0, 1 or more)

Chi-squared test

Urine pregnancy testa (binary)

Repeat abortion

Self-report (binary) (0, 1 or more)

Chi-squared test

Effective modern contraception use over 4-month period

Self-report (binary) (<80%, >80%)

Chi-squared test

Contraceptive discontinuation

Discontinuation after starting contraceptive method (time to event)

Kaplan-Meier survival analysis

Involvement in road traffic accident

Self-report (binary)

Chi-squared test

Domestic abuse

Self-report (binary)

Chi-squared test

3. Sensitivity and per-protocol analysis

  

Participants that completed follow-up

All outcomes

Chi-squared/T-test/logistic and linear regression

Clustering among participants from one clinic

  

Per-protocol analysis

  

4. Sub-group analysis

All outcomes

 

Age

  

Urban versus rural residence

 

Logistic/linear regression

Level of education

  

Socioeconomic status

  
  1. Follow-up at 4 months for all participants will comprise a telephone interview conducted by a research assistant.
  2. aApproximately 50 participants from one clinic will be requested to attend for face-to-face follow-up for objective measurement of contraceptive outcomes.