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Table 5 Predictors of high antenatal care score - intention to treat analysis

From: PRENACEL – a mHealth messaging system to complement antenatal care: a cluster randomized trial

Predictor ANCS <42 points ANCS ≥42 points Crude RR (95% CI) Adjusted RR (95% CI)a
Group - ITT
 Control PCHUs 75 (17.0%) 365 (83.0%) 1 1
 Intervention PCHUs 91 (11.8%) 679 (88.2%) 1.05 (1.01–1.10) 1.05 (1.00–1.09)
Socioeconomic class
 Upper/Upper Middle 13 (11.3%) 102 (88.7%) 1 1
 Middle 58 (10.0%) 523 (90.0%) 0.95 (0.89–1.02) 1.10 (0.97–1.25)
 Lower 46 (16.3%) 236 (83.7%) 1.01 (0.95–1.08) 0.95 (0.88–1.01)
Illicit Drug use
 Yes 8 (25.8%) 23 (74.2%) 1 1
 No 133 (12.4%) 935 (87.6%) 1.14 (1.01–1.29) 1.01 (0.95–1.08)
  1. ANCS antenatal care score, PHCU Primary Health Care Units, RR Relative Risk, ITT Comparison of intervention group (women from intervention PHCUs, regardless of whether or not they had received any SMS) with control group
  2. aRR also adjusted by the number of community health workers in each group