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Table 4 Estimates from the Heckman–type selection model

From: Gastroesophageal reflux symptoms among Italian university students: epidemiology and dietary correlates using automatically recorded transactions

  Coef. Std. Err. P-value 95% CI
Outcome model: Presence of GERD
Gender 0.255 0.051 <0.001 (-0.354;-0.156)
(cons) 1.302 0.448 0.004 (-2.180;-0.424)
Selection model: Survey Participation
Gender 0.222 0.018 <0.001 (-0.257;-0.187)
Age 0.012 0.002 <0.001 (-0.015;-0.009)
(cons) 0.878 0.047 <0.001 (-0.971;-0.786)
ρ 0.582 0.316   (-0.263;0.922)