What Is Meant by “Missing at Random”?

What is the difference between missing completely at random and missing at random?

The terminology describing missingness mechanisms is confusing. In particular the meaning of 'missing at random' is often misunderstood, leading researchers faced with missing data problems away from multiple imputation, a method with considerable advantages. The purpose of this article is to clarify how 'missing at random' differs from 'missing completely at random' via an imagined dialogue be...

Melanotropic peptides: what exactly is meant by "melanotan"?

Sir, We read with interest the letter from Thestrup-Pedersen & Søndergaard (1) reporting the augmentation of len-tiges and naevi in a young male patient who had been self-injecting with " melanotan ". As in a case we initially reported (2), a clinically suspicious naevus was excised, with histology revealing a benign naevus, with no evidence of malignant transformation. The patient was also not...

What is meant by patient-centredness being value-based?

OBJECTIVE To examine whether it is possible to further specify what is meant when we maintain that patient-centredness as a communication skill is a value-based clinical procedure. DESIGN AND MAIN OUTCOME MEASURES Since a core element in patient-centredness is associated with patients feeling respected, a study regarding encounters where patients felt respected was analysed. RESULTS Similar...

What Medicare Is Missing.

Distinguishing "Missing at Random"i and "Missing Completely at Randomn"