Table 2: Results from a hypothetic study with two treatment groups. The outcome is the mean clinical attachment level (CAL) and the standard deviation in brackets.

CALBaselineFollowup at 12 monthsChange

Test10.5 (1.9)6.2 (1.5)4.3 (1.3)
Control10.3 (1.8)8.4 (1.6)1.9 (1.1)