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Table 3 Covariates for the two-stage least squares (TSLS) analysis

From: Intermediate outcomes in randomized clinical trials: an introduction

Regression model for pregnancy, given treatment assignment:
Questions on the form: Description of the covariate:
ADM_Q2 Age (years)
ADM_Q3 Parity (previous pregnancies >24 weeks)
ADM_Q14 Any health problems
ADM_Q1SA Blood pressure systolic (normal/abnormal)
ADM_Q15B Blood pressure diastolic (normal/abnormal)
ADM_Q16 Body mass index (normal/abnormal)
ADM_Q17  
Regression model for preeclampsia. Given pregnancy:
Questions on the form: Description of the covariate:
ADM_Q2 Age (years)
ADM_Q3 Parity (previous pregnancies >24 weeks)
ADM_Q14 Any health problems
ADM_Q1SA Blood pressure systolic (normal/abnormal)
ADM_Q1SB Blood pressure diastolic (normal/abnormal)
ADM_Q16 Body mass index (normal/abnormal)
ADM_Q17