However, the survey was not applicable to HCPs who did not have direct responsibility for the care of ADHD patients, which may explain our relatively low response rate.
The survey had a relatively low response rate, 62%, indicating that the responses they did receive do not reflect broader discontent, and Sunni populations appear to be under-represented, but neither ABC News nor D3 released all relevant sampling data.
"Drawing any firm conclusions is difficult because of the relatively low response rate at 12 months and in particular the lack of randomisation, which means that the results may have been produced by differences between patient groups that have not been taken into account," the reviewers had found.
With a relatively low response rate, however, it is plausible that asymptomatic subjects represent a large percentage of the nonrespondents.
The second limitation is the relatively low response rate to the questionnaire.
The limitations of this survey include the relatively low response rate, with only 946 completed questionnaires (4.3 %).
Other major difficulties identified during the methodological development were the relatively low response rate in co-ordinator survey and interpretation of the multi-level objective and target structures of the FPs as the basis for evaluation.
Furthermore, the relatively low response rate of 57% may have induced selection bias and resulted in a distorted conclusion.
There are of course several limitations, including the relatively low response rate and the MARS questionnaire which shows quite a low variance.
Second, the relatively low response rate (54.8%) may have resulted in a biased sample and become potential threats to the generalizability of the findings to the whole population.
It has been argued that therapy based on receptor concentration, ignoring the activation and phosphorylation state of the receptor and its interaction with other HER receptors continues to yield a relatively low response rate [13], [14].
