Many studies of clinical experience were excluded from the metanalysis
because they presented clinicians only with written descriptions of clients, a task that poorly reflects the actual process of decision making, White says.
Mackenzie and the manager of Hemopure in South Africa, Dr Mandisa Maholwana, revealed that since the controversial metanalysis
appeared in the Journal of the American Medical Association (JAMA), (1) in April, usage reticence had crept in.
Klurfeld would like to perform a similar metanalysis
of human studies on wheat bran's role in preventing colon malignancies, the third leading cause of cancer deaths in the United States.
Such a case metanalysis
goes beyond traditional literature reviews because it is "more systematic, more explicit, more exhaustive, and more quantitative" (Rosenthal 1984, 17).
statistically combines a large number of studies of some phenomenon, such as sex differences in performing spatial tasks, and calculates the overall extent to which such differences occur.
Chief among these is a combined analysis, or metanalysis
, of 23 studies suggesting that women who had abortions increased their risk of breast cancer by 90 percent (SN: 10/19/96, p.
"We are hoping [the findings] will be part of the information they get when they are making their decision." Other researchers reject the results of the metanalysis
. Among other things, they challenge the validity of using studies that hinge on a breast cancer patient's willingness to admit that she has had an abortion.
Goluboff, also at Columbia-Presbyterian, reanalyzed data from a 1992 metanalysis
that combined a number of independent studies to reveal a worldwide decline in sperm quality.
This kind of review, known as metanalysis
, offers investigators great statistical power in reaching conclusions but remains controversial.
In the context of the language sciences it is interesting that the term with the asterisk, metanalysis
, has the Etymonline note:
A systematic review and a study of metanalysis
. Autoimmun Rev.
"Additionally, it's currently being studied as an effective strategy for pain management, addiction and weight loss." A new metanalysis
has just been published suggesting that mindfulness-based stress reduction is potentially helpful in managing chronic pain.