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Table 1 Comparison of gender and birth weight distribution of neonates in experimental and control 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 Frequency (percentage)

Control Frequency (percentage)

P-value Chi-square test

Variable

Birth weight (gr)

  < 1500

9 (30)

12 (40)

P = 0.065

  ≥ 1500

21 (70)

18 (60)

 

Gender

 Female

11 (44)

14 (56)

P = 0.39

 Male

14 (56)

11 (44)

 

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

Variable

Neonate’s age (hour)

70.21 ± 8.9

65.20 ± 6.8

P = 0.35

Gestational age (week)

33.2 ± 1.27

32.1 ± 1.77

P = 0.06