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Table 2 Illustrative sample size calculations 1 for outcomes along the continuum of care from pregnancy to post-natal in Tanzania and Uganda

From: The use of continuous surveys to generate and continuously report high quality timely maternal and newborn health data at the district level in Tanzania and Uganda

Stage in the continuum of care Indicator Expected level in comparison group Sample size (live births) in each group needed to find percentage point increases of2:
10 15 20
Pre-pregnancy 1 Used family planning prior to new pregnancy 0.40 597 267 151
Antenatal 2 Attended ANC 4 or more times (women who gave birth in the last year) 0.43 603 268 150
  3 Use of IPTp in pregnancy reported by women who gave birth in the last year 0.63 525 223 119
Intra-partum 4 Births in a health facility 0.42 602 268 151
  5 Caesarean sections 0.04 208 113 75
Immediate newborn care 6 Nothing put on cord 0.72 428 175 89
  7 Immediate breastfeeding 0.20 452 214 127
Postnatal care 8 Mother reported post-natal check within 2 days and 7 days of child birth 0.30 549 251 145
  9 Infant received post-natal check within 2 days and 7 days of children birth 0.40 598 262 145
  1. 1Kirkwood B. and Sterne J, Essentials of Medical Statistics. Vol. 2 edition. 2001: Wiley-Blackwell.
  2. 2Indicators across the continuum of care from pre-pregnancy to post-partum, assuming 80% power to detect differences for given percentage point increases between intervention and comparison groups, or over time. Adjusted for design effect (1.4) and for refusals (10%).