Table 1 provides details of the included studies, including a description of the definitions of back pain and of consulting.
A handful of other studies, including a British survey of 677 gay men in London, have identified similar trends.
Epidemiological studies, including a Danish one published last year, have shown no connection between thimerosal exposure and autism.
Ms. Hughes noted that other studies, including a larger July report by RAND, have portrayed Texas students in a good light, particularly in math.
To arrive at their figures, Horton and Hoddinott revisited a number of studies, including a long-running nutrition experiment in Guatemala which started in 1969.
Other studies, including a recent one at Harvard, have predicted that pollen will continue to increase with rising temperatures.
Additional studies including a sufficient number of patients were necessary.
Studies including a greater number of children are needed.
Additional, prospective studies, including a larger number of patients, are warranted.
We reviewed 311 studies including a total of 87 240 adults, children, and parents.
In all, 29 studies, including a number of prospective and retrospective studies, were identified as relevant.
