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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

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