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Table 3 Multivariate analysis

From: Association between factors related to the pregnancy, neonatal period, and later complications (especially asthma) and menarcheal age in a sample of Lebanese girls

Variable

Unstandardized beta

p value

95% confidence interval

Model 1: Linear regression taking the girl’s age at menarche as the dependent variable and taking the NICU admission due to any cause as an independent variable

 Mother’s age at menarche

0.209

0.009

0.052

0.366

 Gestational age

0.069

0.018

0.012

0.125

 Asthma during childhood in the girl (yes vs no*)

− 0.526

0.020

− 0.969

− 0.083

Model 2: Linear regression taking the girl’s age at menarche as the dependent variable and taking each cause for NICU admission as an independent variable

 Number of days of phototherapy

− 0.128

< 0.001

− 0.198

− 0.059

 Mother’s age at menarche

0.223

< 0.001

0.107

0.340

 Preeclampsia during pregnancy (yes vs no*)

− 1.168

0.022

− 2.163

− 0.172

 Asthma during childhood in the girl (yes vs no*)

− 0.504

0.024

− 0.941

0.068

  1. Variables entered in model 1: Gestional age, mother’s age at menarche, maternal smoking during pregnancy and girl’s asthma later in life
  2. *Reference group; Variables entered in model 2: Gestional age, mother’s age at menarche, number of days of phototherapy, small for gestational age, prematurity, materno-fetal infection, maternal smoking during pregnancy, high blood pressure in the mother during pregnancy, mother intake of corticosteroids during pregnancy, girl’s asthma later in life