Skip to main content

Table 3 Multivariate analysis of smoking and birth weight of premature infants (n = 189)

From: Smoking during pregnancy and harm reduction in birth weight: a cross-sectional study

Variable β SE p CI (β; 95%)
(Intercept) − 3791.46 587.97 0.000 (− 2639.07 to − 4943.86)
Smoking in pregnancy
 Yes, 11 to 40 cigarettes per day − 340.03 191.32 0.076 (−715.01 to 34.94)
 Yes, 6 to 10 cigarettes per day 265.27 403.49 0.511 (− 525.56 to 1056.16)
 Yes, 1 to 5 cigarettes per day − 475.24 309.48 0.125 (−1081.80 to 131.34)
 No     reference
≥ 7 prenatal medical visits
 Yes 394.58 135.28 0.004 (129.44 to 659.73)
 No     reference
Participation in prenatal group
 Yes −27.69 147.23 0.851 (− 316.25 to 260.86)
 No     reference
Emotional problems
 Yes 103.30 197.31 0.601 (− 283.81 to 490.41)
 No     reference
High blood pressure/pre-eclampsia/ eclampsia/ HELLP syndromea
 Yes −23.82 198.03 0.904 (− 411.95 to 364.32)
 No     reference
Hemorrhage/bleeding/ threatened abortion
 Yes 342.39 211.14 0.105 (−71.44 to 756.21)
 No     reference
Infection
 Yes − 312.23 186.72 0.094 (− 678.29 to 53.63)
 No     reference
Gestational age (weeks) 180.68 16.32 < 0.001 (148.68 to 212.67)
Hyperemesis
 Yes − 307.98 261.78 0.239 (− 821.06 to 205.11)
 No     reference
  1. aHELLP hemolysis, elevated liver enzymes, low platelet count