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Table 6 Design effect and intra-cluster correlation for each intermediate step for the delivery of ITN and IPTp

From: Effectiveness of the delivery of interventions to prevent malaria in pregnancy in Kenya

Delivery steps Level 4 Level 3 and 2 Overall
% Pregnant women % Range DE ICC % Pregnant women % Range DE ICC % Pregnant women % Range DE ICC
ITN eligible: attend ANC first visit 100.0     100     100    
 ITN in stock 90.9 (84.9–100.0) 3.1 0.023 100     94.8 (84.9–100.0) 5.1 0.044
 Offered an ITN 63.4 (55.6–74.2) 0.7 −0.003 68.6 (35.3–100.0) 9.1 0.087 66.0 (35.3–100.0) 4.4 0.037
IPTp eligiblea 100.0     100     100    
 SP in stock 100.0     100     100    
 Seen at ANC consultation 100.0 100.0    99.7 (98.6–100.0) 0.7 −0.003 99.9 (98.5–100.0) 0.9 -0.001
 Being given SP during visit 68.6 (61.5–73.2) 2.2 0.013 80.3 (60.7–95.7) 6.8 0.062 74.0 (60.7–95.7) 4.6 0.039
 Being given three tabs SP during visit 99.0 (98.2–100.0) 0.9 −0.001 94.1 (76.5–100.0) 5.1 0.044 96.5 (46.4–95.7) 4.9 0.042
 SP by DOT 64.6 (0.0–86.9) 38.0 0.398 70.1 (24.1–100.0) 34.2 0.357 67.3 (24.1–100.0) 29.0 0.301
 Has SP on exit 36.7 (11.3–96.6) 26.0 0.269 27.1 (0–80.0) 28.7 0.298 31.5 (0–96.6) 22.3 0.229
 Knows to take three tablets SP 92.1 (85.7–100.0) 1.0 0.000 96.4 (87.5–100.0 2.7 0.018 94.2 (85.7–100.0) 1.7 0.008
 Knows to take three tablets SP or took SP as DOT 92.1 (86.2–93.8) 0.6 −0.004 97.1 (70.0–100.0) 6.4 0.058 94.8 (70.0–100.0) 2.9 0.020
  1. aIPTp eligibility according to Kenya national guidelines was women not taking cotrimoxazole (or being HIV positive as a proxy for cotrimoxazole use), having felt the baby move (i.e. past quickening) or being 16 weeks gestation or over
  2. ANC antenatal care, DE design effect, DOT directly observed therapy, ICC intra-class correlation, IPTp intermittent preventive treatment, ITN insecticide-treated net, SP sulfadoxine–pyrimethamine