Associations between internet-based patient ratings and conventional surveys of patient experience in the English NHS: an observational study.
Greaves F, Pape UJ, King D, et al. Associations between Internet-based patient ratings and conventional surveys of patient experience in the English NHS: an observational study. BMJ Qual Saf. 2012;21(7):600-605. doi:10.1136/bmjqs-2012-000906.
This study found that unsolicited patient ratings of hospitals in the United Kingdom correlated reasonably well with standard measures of patient satisfaction with hospital care.