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Table 2 Comparison of mean bilirubin levels before, 6 h after, and 24 h after intervention in study groups

From: Efficacy of zinc sulfate on indirect hyperbilirubinemia in premature infants admitted to neonatal intensive care unit: a double-blind, randomized clinical trial

Study group

Experimental Mean ± Standard deviation (\( \overline{\mathrm{X}}\pm SD\Big) \)

Control Mean ± Standard deviation (\( \overline{\mathrm{X}}\pm SD\Big) \)

Independent t-test

Time point

Before intervention (mg/dL)

6 h after intervention (mg/dL)

24 h after intervention (mg/dL)

12.2 ± 71.67

10.2 ± 35.24

 

11.2 ± 26.62

9.2 ± 86.32

9.2 ± 45.83

8.2 ± 44.10

Repeated measures ANOVA result

P < 0.001

  

Bonferroni post-hoc test result

Before and six hours after intervention (p = 0.004)

Before and 24 h after intervention (p < 0.001)

Six hours and 24 after intervention (p < 0.001)

Before and six hours after intervention (p = 0.001)

Before and 24 h after intervention (p < 0.001)

Six hours and 24 after intervention (p < 0.001)