Sentence examples for studies were categorized with from inspiring English sources

Subsequently, all studies were categorized with respect to student characteristics, learning environment characteristics, learning processes and outcomes.

The remaining five studies were categorized as controlled studies with (n = 3) [23 25] or without confirmed randomization (n = 2) [15, 27] (Table 1).

The included studies were categorized into two groups: cross-sectional studies with adjusted geometric mean as the outcome, and cross-sectional studies with OR as the outcome.

Studies were categorized according to the risk of bias assessed with QUADAS-2: low risk (three studies), high risk (four studies), and unclear risk of bias (11 studies).

Studies were categorized as either National Institutes of Health (NIH) sponsored or IS.

Studies were categorized as prospective or retrospective.

Two studies were categorized as low quality [ 59, 69].

Relevant studies were categorized according to medication type and effect.

In addition, the theoretical backgrounds of the studies were categorized.

Studies are categorized by different plate shapes.

The studies are categorized based on the following characteristics: morphology of the urban area (generic versus real) and methodology (with or without validation study).