Table 1 Rating scale for evidence of sex/gender differences

0

No evidence of sex or gender differences

1

Evidence of sex or gender differences, but studies are small, from only one lab, or not well controlled

2

Evidence of sex or gender  differences in at least one aspect of the topic under investigation. Studies may be small but come from multiple research groups or have been replicated.

3

Evidence of sex or gender  differences in at least two aspects of the topic under investigation. Studies may be small but come from multiple research groups or have been replicated.

4

Evidence of sex or gender differences in at least two aspects of the topic under investigation. Studies are large and from multiple groups.

NA

No research has directly studied sex/gender differences for this disorder or condition.