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Table 2 Multiple logistic regression analysis of in vitro fertilisation ratesa,b,c (n = 152)

From: The effect of cigarette smoking, alcohol consumption and fruit and vegetable consumption on IVF outcomes: a review and presentation of original data

Variable β Coefficient Standard error P
Constant 0.277 0.214 0.196
Female nicotine (mg/wk) −0.012 0.009 0.176
Female smoke (years) −0.047 0.010 < 0.001
Female smoke years*nicotine 0.001 < 0.001 0.044
Male alcohol (std drinks/wk) 0.074 0.014 < 0.001
Male F&V (serves/wk) 0.034 0.007 < 0.001
Male alcohol*F&V −0.001 0.001 0.011
  1. *depicts the potential interaction between two terms analysed by logistic regression
  2. aY = no. of oocytes fertilised (2PN) weighted by total no. of oocytes retrieved
  3. badjusted R2 = 0.236, deviance = 281.508, 141df, P < 0.001
  4. cnon-significant variables: female age, female alcohol, female F&V, male age, oligozoospermia, asthenozoospermia, teratozoospermia, male nicotine and male smoke years