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Table 2 Mean differences over time in intervention mechanisms for each intervention

From: Evaluating mechanisms of change in an oral hygiene improvement trial with older adults

Mechanism   AMI counseling intervention   Oral health campaign
Characteristics (N = 163)   Mean (SD) Difference in mean (SD) Paired t-test p value   Mean (SD) Diff. in mean (SD) Paired t-test p value
OH Self- efficacy Time 0 3.42 (0.55) − 0.18 (0.59) < 0.0001 Time 0 3.40 (0.60) 0.01 (0.71) 0.779
Time 1 3.60 (0.49)    Time 1 3.39 (0.59)   
OH Perceived risk Time 0 2.95 (0.72) − 0.11 (0.70) 0.046 Time 0 2.97 (0.76) − 0.08 (0.86) 0.238
Time 1 3.06 (0.69)    Time 1 3.05 (0.80)   
OH Fears Time 0 2.14 (1.03) − 0.40 (1.0) < 0.0001 Time 0 2.34 (1.05) − 0.22 (1.01) 0.008
Time 1 2.54 (1.08)    Time 1 2.57 (1.12)   
OH Intent Time 0 1.72 (0.34) − 0.12 (0.30) < 0.0001 Time 0 1.62 (0.41) − 0.08 (0.33) 0.004
Time 1 1.84 (0.28)    Time 1 1.71 (0.37)   
OH Locus of control Time 0 2.78 (0.67) − 0.15 (0.81) 0.014 Time 0 2.82 (0.69) 0.03 (0.74) 0.621
Time 1 2.94 (0.67)    Time 1 2.78 (0.71)   
OH Norms Time 0 3.66 (0.42) − 0.16 (0.53) < 0.0001 Time 0 3.73 (0.37) − 0.11 (0.42) 0.002
Time 1 3.82 (0.35)    Time 1 3.84 (0.28)   
OH worries Time 0 2.81 (0.86) − 0.27 (0.70) < 0.0001 Time 0 2.94 (0.83) − 0.16 (0.72) 0.007
Time 1 3.08 (0.78)    Time 1 3.11 (0.84)   
Sugar Time 0 0.70 (0.49) 0.07 (0.47) 0.052 Time 0 0.71 (0.48) 0.15 (0.49) < 0.0001
Time 1 0.63 (0.45)    Time 1 0.56 (0.42)   
Brushing Time 0 4.02 (.831) − 0.172 0.001 Time 0 3.88 (.938) 0.021 .683
Time 1 4.20 (.727)    Time 1 3.86 (.861)   
Flossing Time 0 2.28 (1.880) − .718 0.001 Time 0 1.93 (1.75) − .273 0.029
Time 1 2.91 (1.534)    Time 1 2.20 (1.730)