21 This modified version consists of 11 items on methodological characteristics that have the potential to introduce bias (see appendix B on bmj.com).
In previous research, several methodological choices and survey characteristics have been shown to be related to the estimates of crime prevalence (Addington 2008; Eckberg 2015; Powers 2015; Schneider 1981; Skogan 1986; Tourangeau and McNeeley 2003): The wording of the questions is important.
Much research on patient and environment characteristics has been compromised by methodological flaws such as sample selection bias.
The CUSUM technique has several methodological characteristics that make it perform better than the commonly used healthcare quality control tools such as incident reporting and clinical audit or indeed any other methods that report aggregate results.
The CUSUM technique has several methodological characteristics that should make it perform better than the commonly used healthcare quality control tools such as incident reporting and clinical audit, or indeed any other methods that report aggregate results.
Epidemiological and methodological characteristics of these trials have been previously described [ 7].
Poor reporting of the methodological characteristics of randomised trials has been previously described.
However, we assume that NI trials retrieved from PubMed do not have different methodological characteristics than NI trials in other databases, so we do not think that this influenced our results.
It has the same methodological characteristics but a broader range of viral analytes than the U.S. FDA-approved version.
