Chronic Heart Failure Glossary NICE 2018. All rights reserved. Subject to Notice of rights. ISBN: 978-1-4731-3093-7 Term Definition Long-term care Residential care in a home that may include skilled nursing care and help with everyday activities. This includes nursing homes and residential homes. Logistic regression or Logit model In statistics, logistic regression is a type of analysis used for predicting the outcome of a binary dependent variable based on one or more predictor variables. It can be used to estimate the log of the odds (known as the logit ). Loss to follow-up A patient, or the proportion of patients, actively participating in a clinical trial at the beginning, but whom the researchers were unable to trace or contact by the point of follow-up in the trial Markov model A method for estimating long-term costs and effects for recurrent or chronic conditions, based on health states and the probability of transition between them within a given time period (cycle). Meta-analysis A method often used in systematic reviews. Results from several studies of the same test or treatment are combined to estimate the overall effect of the treatment. Multivariate model A statistical model for analysis of the relationship between 2 or more predictor (independent) variables and the outcome (dependent) variable. Negative predictive value (NPV) In screening or diagnostic tests: A measure of the usefulness of a screening or diagnostic test. It is the proportion of those with a negative test result who do not have the disease, and can be interpreted as the probability that a negative test result is correct. It is calculated as follows: TN/(TN+FN) Net monetary benefit (NMB) The value in monetary terms of an intervention net of its cost. The NMB can be calculated for a given cost-effectiveness threshold. 