Almost all (65 of 69, 94%) infections categorized as persistent under the six-month definition were persistent under the two-week definition.
Similarly, almost all (3,027 of 3,221, 94%) infections categorized as absent under the six-month definition were also absent under the two-week definition.
Because there are two PHN endpoints of interest (1 and 3-months definition), the direct PHN vaccine efficacy input parameter was adjusted in the model in order to best reflect the efficacy in reducing the incidence of PHN.
In 2007, before the Great Recession, people who were looking for work for more than six months — the definition of long-term unemployment — accounted for just 0.8 percent of the labor force.
Weight gain management cost was equivalent to one visit to a general physician every three months; this definition was based on expert opinion.
What we are clearly embarking upon is a month-by-month recession watch, which will be testing for "a significant decline in economic activity, spread across the economy, lasting more than a few months"–the definition of recession at the Web site of the National Bureau of Economic Research.
With a cut-off of nine months our definition of LTFU was conservative and minimized the number of patients incorrectly classified as LTFU, i.e. the number of false positives.
For infants younger than 2 months, the definition was based on the mother's or caretaker's assessment that the child had diarrhea [ 15].
There were also no differences in the proportion of self-reported HIV negative participants who reported unprotected anal intercourse with a known HIV positive or unknown serostatus partner in the previous six months (our definition of risky sex).
We used recent wheeze as a proxy for asthma (defined as the presence of wheeze in the last 12 months), a definition that has been validated in different populations and that is widely used in epidemiologic studies [ 17, 18], and is especially useful in populations with limited access to health care [ 9].
