I can suggest you these papers below of a professor of mine (Lucia de Fátima da Silva) who have been studying this issue (confort) in the Nursing Brazilian context.
Link:
a) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-07072014000100056&lng=pt&nrm=iso
b) http://www.scielo.br/pdf/rgenf/v37n4/en_0102-6933-rgenf-1983-144720160465022.pdf