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Table 2 Univariate Logistic Regression Analysis of the characteristics of pregnant women to identify factors associated with low birth weight of infants (n = 222)

From: Impact of maternal respiratory infections on low birth weight - a community based longitudinal study in an urban setting in Pakistan

Pregnant women characteristics Crude OR (95% CI) P-value
Pregnant women age (years) For every 5 year increase 0.7 (0.5 0.9) 0.032
Age at first pregnancy (years) For every 5 year increase 0.9 (0.6 1.5) 0.796
Gravidity (total number of pregnancies) For every 1 unit increase 0.8 (0.7 0.9) 0.031
Weight at first visit (kg) For every 10 kg weight increase 0.6 (0.5 0.9) 0.006
Height of pregnant women (cm) For every 10 cm increase 0.9 (0.7 1.3) 0.739
Pregnant women education No education 1   0.805
Below high school equivalent 0.8 (0.3 1.8)  
High school equivalent and above 0.9 (0.3 2.4)
Household characteristics
No of people living in house hold For every 1 unit increase 1.0 (0.9 1.1) 0.766
No of rooms in the household For every 1 unit increase 1.0 (0.8 1.3) 0.738
Total score of household assets For every 200 unit increase 0.7 (0.4 0.9) 0.073
Source of drinking water Piped water 1   0.578
Water bought from tankers 1.1 (0.5 2.4)
Water bought from drums 1.5 (0.7 3.1)
Use of boiled water Yes 0.9 (0.4 2.0) 0.847
No 1.0 -
Antenatal characteristics
Child gestational age in weeks For every 1 week increase 0.4 (0.2 0.8) 0.000
First pregnancy No 1   0.798
Yes 0.9 (0.4 2.1)
Number of antenatal visits during current pregnancy For every 1 visit increase 1.0 (0.8 1.3) 0.828
Delivery location of last child No previous pregnancy 1 (0.4 2.6) 0.815
Maternity home 1.0  
  Home 1.2 (0.5 2.9)
Clinical characteristics
Maternal fevera For every 10 episode increase 1.1 (0.7 1.6) 0.698
Maternal diarrheaa For every 5 episode increase 0.8 (0.6 1.1) 0.178
Maternal vomitinga For every 10 episode increase 0.9 (0.7 1.4) 0.969
Total number of Respiratory symptom episodesa For every 50 episodes increase 1.2 (0.8 1.8) 0.313
  1. aEpisodes per 100 weeks of pregnancy