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Table 4 GRADE evidence table for Study’s outcome measures

From: Acceptability of mobile-phone reminders for routine childhood vaccination appointments in Nigeria – a systematic review and meta-analysis

Outcomes Risk of biasa Imprecisionb Indirectnessc Inconsistencyd Sample size Quality
Ownership of mobile-phone Not serious Not serious Not serious Not serious 9923 High quality
Acceptability of mobile-phone reminders Not serious Not serious Not serious Serious 9923 Moderate quality
Preference: Phone calls over SMS/texts Not serious Not serious Not serious Serious 2865 Moderate quality
Preference: SMS/texts over phone calls Not serious Not serious Not serious Serious 2865 Moderate quality
  1. aMore than 25% of studies with a risk of bias (i.e., inappropriate sampling method or statistical analyses)
  2. bMore than 25% of studies with small sample size
  3. cMore than 25% of studies did not use valid and reliable methods for data collection
  4. dHeterogeneity across the studies (confidence interval ≥ 5.0% between upper and lower limits)