The OFT said practices which cause concern include unclear fee structures, reducing the price at the last minute, and wrongly claiming to be a cash buyer.
Sinani criticized what he called "loopholes" in the U.S. policy, which include unclear standards around how to look at alternatives to fossil fuel projects and how to evaluate what is considered "feasible" in a country.
In both scenarios, "u" was recorded as missing data; this included unclear or ambiguous bands.
Other potential limitations include unclear sequence generation, unclear allocation concealment, and a very high dropout rate in some of the included trials.
Important study limitations include unclear adequacy of sequence generation, unclear allocation concealment, single blinding, and lack of intention-to-treat analysis.
Barriers to reporting included unclear definitions of a reportable AEFI, time pressures in completing a report, and confusion in whose responsibility it was to report.
We excluded the perinatal mortality data from one trial relevant to this analysis (Wu 2011) due to multiple risk of bias concerns, including unclear group denominators.
Technical problems (28 comments) included unclear instructions, inadequate time provision and instructions between stations and detention of some candidates at stations by examiners.
However, there are some methodological limitations to the study, including unclear allocation concealment, no blinding, and no intention-to-treat analysis; this may result in selection, performance, and/or attrition biases and, eventually, invalidate the results.
The causes of non-adherence are multifactorial and may include unclear or unrealistic treatment goals, side effects or inconvenience of therapy, cost, or simply forgetting to follow a treatment regimen.
