Skip to main content

Table 6 Effects of multiple micronutrient powder provision on heamoglobin (Hb) concentration, anaemia prevalence, and Bayley mental and psychomotor development scores by experimental assignment in first period

From: The effect of a micronutrient powder home fortification program on anemia and cognitive outcomes among young children in rural China: a cluster randomized trial

  Hb concentration (g/L)1 Anemia prevalence (Hb <110 g/L)1 Bayley MDI (points)2 Bayley PDI (points)2
Trial arms compared Difference (95% CI) P value Marginal effect (95% CI) P- value Difference (95% CI) P- value Marginal effect (95% CI) P- value
Free vs control after 6 months follow-up3 1.840 (− 0.189–3.868) 0.075 − 0.048 (− 0.129–0.034) 0.252 3.025 (0.443–5. 606) 0.022* − 1.624 (− 5.166–1.918) 0.368
Free vs control after 12 months3 − 0.502 (− 2.760–1.757) 0.662 0.026 (− 0.056–0.108) 0.535 1.978 (− 0.899–4.855) 0.177 − 0.846 (− 3.807–2.114) 0.574
Free vs control after 18 months3 − 0.718 (− 2.930–1.494) 0.524 0.026 (− 0.054–0.107) 0.523 2.808 (− 0.159–5.774) 0.064 − 0.162 (− 2.785–2.419) 0.902
Text vs control after 6 months4 1.715 (− 0.347–3.777) 0.103 − 0.069 (− 0.146–0.007) 0.075 1.423 (− 1.184–4.030) 0.284 1.061 (− 2.379–4.501) 0.544
Text vs control after 12 months 4 0.266 (− 2.220–2.752) 0.833 0.042 (− 0.046–0.129) 0.348 − 0.70 (− 3.788–2.389) 0.656 − 0.062 (− 2.886–2.763) 0.966
Text vs control after 18 months 4 0.936 (−1.419–3.290) 0.435 − 0.027 (− 0.110–0.056) 0.526 − 0.776 (− 3.90–2.348) 0.626 0.347 (− 2.600–3.294) 0.817
R-squared 0.14 0.10 0.27 0.21
Observations 6092 6092 6204 6186
  1. 1 Intention to treat analysis, and regression estimates from multiple linear models adjusted for gender, age, Hb test machine and county fixed effects. Standard errors are clustered at the village level
  2. 2 Intention to treat analysis, and regression estimates from multiple linear models adjusted for gender, age, parenting practice (whether caregiver used toys played with child the previous day, sang to child previous day), BSID tester and county fixed effects. Standard errors are clustered at the village level
  3. 3 “Free” group received free MNP sachets but not daily text message reminders
  4. 4 “Text” group received free MNP sachets and daily text message reminders for the first six months of the trial
  5. *p-value < 0.05 significant