One methodologically similar study to ours in a northern Pennsylvania rural family medicine clinic showed a 47% prevalence of CAM use, with the most common modalities being chiropractic (17.2%), relaxation techniques (16.9%), herbal medicine (16.9%), and massage (14.2%).
However, a methodologically similar study from Malawi that compiled monthly reports showed a 15.5% HIV infection rate among infants on sdNVP regimen tested at 6 weeks postpartum without accounting for the breast feeding transmission [ 33].
However, especially in methodologically similar UK studies, average preoperative health scores are lower compared with this study, allowing a higher increase in scores [ 5].
Regarding awakening cortisol levels, this study did not replicate a decreased CAR to be associated with antisocial behavior as reported previously in a methodologically very similar study by Popma and colleagues [ 10] or in a large study by Freitag and colleagues [ 50] investigating children with ADHD.
A central component of many systematic reviews is meta-analysis, the quantitative synthesis of information across methodologically and epidemiologically similar studies that address the same research question.
The women's group studies were the most comparable since a common strategy was applied in different countries and with differing intensity (in terms of population coverage), and they were methodologically similar as the studies had several researchers in common.
Our prediction models were based on epidemiological data from the Aetiology and Ethnicity in Schizophrenia and Other Psychoses (ÆSOP) and the East London First Episode Psychoses (ELFEP) studies, 18 20 two methodologically similar population-based FEP studies.
Building on this idea, several successful studies (methodologically similar to each other) identified new drugs for hepatocellular carcinoma [26], and were able to show the efficacy of vorinostat (currently used to treat cutaneous T-cell lymphoma) in treating gastric cancer [43] and also to predict several candidate therapeutics for cancer in a systematic manner [20,25].
This study is methodologically similar to Hamilton (2014) but differs in important ways.
