These are therapies that have been extensively investigated with high-quality efficacy studies, although not all are consistently reimbursed and therefore are not used extensively in clinical practice.
We therefore suggest that future cohort studies without randomisation may offer a viable option to obtain high-quality efficacy and treatment-toxicity data in a prospective manner.
Orphan drug clinical trials often are adversely affected by a lack of high quality treatment efficacy data that can be reliably compared across large patient cohorts derived from multiple governmental and country jurisdictions.
If the analysis was restricted to high quality studies, the efficacy to prevent all ICU-acquired infections was 41%9595% CI of efficacy = 24%to5353%) and a reduction of heterogeneity among studies became evident (Q = 3.9 P = 0.14; I2 = 48.7%).
This may provide a new avenue for research, although high quality data demonstrating efficacy are required before being introduced as a treatment option for women with symptomatic IUAs (Asherman syndrome).
International Conference on Harmonization (ICH) guideline Q1A on stability testing of new drug substances and products requires that stress testing be carried out to elucidate the inherent stability features of the active substance which may be changed during storage and so, ensure high quality, safety, and efficacy of the pharmaceutical product [11].
These symptoms can be treated with antidepressants and cognitive behavioral therapy; however, high quality studies on efficacy are lacking.
There is a lack of high quality evidence concerning the efficacy of total knee arthroplasty (TKA).
However, high quality evidence on safety, efficacy, effectiveness, efficiency, and cost savings for children and adolescents is lacking.
There is a lack of high quality evidence concerning the efficacy of TKA [ 6] and around 20%% of KOA patients experience little or no improvement in pain, disability and quality of life following the TKA [ 22].
