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. 2013 Apr 11;13:334. doi: 10.1186/1471-2458-13-334

Table 3.

Convergent validity of Bull-M

Bull-M Bull-S
Never
3.5%
Never
3.8%
Rarely
17.6%
Rarely
42.9%
Sometimes
31.7%
Twice a week
35.3%
Often
27.6%
Everyday 19.6% Everyday 17.1%

In the Bull-M the average of items 6 to 10 were considered, in the Bull-S only the item 13.