However, this statement is commonly not valid in hypotensive patients, especially those with right heart failure.
We included studies that employed three commonly used valid quality improvement designs: RCTs, non-randomised studies with concurrent controls or controlled before and after studies.
Although a commonly accepted valid rating instrument concerning the quality assessment of observational studies does not yet exist, there appears to be consensus about important items [ 19- 21].
To consider an example which is much discussed in the research ethics literature, it is commonly assumed that valid consent for randomized clinical trials requires individuals to understand randomization.
Lupus activity is commonly measured by valid and reliable disease activity physician-rated scores, such as the Systemic Lupus Activity Measure (SLAM) [ 33], the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) [ 34], or the British Isles Lupus Assessment Group BILAGG) [ 35].
In the same way, sequence similarity is commonly regarded as a valid measure for gene evolution.
ULS is a reliable and valid instrument, commonly used with people from adolescents to older adults.
PANSS is a reliable and valid scale commonly used to score symptom severity in schizophrenia [ 65].
Although self-reports may be less accurate than objective observations, self-administered questionnaires are valid, most commonly used, and most inexpensive method to use in large-scale studies.
The commonly used reliable and valid Hospital Anxiety and Depression Scale (HADS) [ 18] was used to confirm depression symptoms on a 7-item five-point scale (0 4) [ 19].
