Sentence examples for many studies lack from inspiring English sources

However, many studies lack external validity.

Limitations: Many studies lack appropriate control groups and standardised measures of symptoms and diagnosis.

It also strikes us that many studies lack a specific description of the residential intervention program.

A collective interpretation is difficult because many studies lack sufficient control and have unreasonably high baseline levels of oxidatively damaged DNA.

Finally, many studies lack adequate details about learning activities, raising questions about whether poor instructional design may have adversely affected results.

However, many studies lack information on the use of hormone replacement therapy (HRT) and mammography examinations before diagnosis.

The description of procedures for selection of participants in many studies lacked detail, with particular emphasis on diagnosis.

Only four cross-sectional studies were considered to be of good overall quality, 28 30 36 and many studies lacked detail on their methodology.

Fourthly, the receipt and type of depression treatment were not taken into consideration, and many studies lacked information on depression treatment and antidepressant medication use.

Moreover, many studies lacked a control or comparison group and were thus unable to identify the effect of provider payment on CBI performance.

A recent review of RCTs of psychological interventions for problem gambling found that the average sample in these studies was 89 participants, ranging from 13 to 231, 20 with many studies lacking the statistical power required to detect change.