Missing covariate data in medical research: to impute is better than to ignore.
Janssen
Kristel J M
KJ
Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands. k.j.m.janssen@umcutrecht.nl
Donders
A Rogier T
AR
Harrell
Frank E
FE
Vergouwe
Yvonne
Y
Chen
Qingxia
Q
Grobbee
Diederick E
DE
Moons
Karel G M
KG