Table 2. Between-Group Difference in SIV Uptake and SOC at Month 6.
| Outcome | Participants, No. (%) | P value | |
|---|---|---|---|
| Intervention group | Control group | ||
| Complete case analysis | |||
| Total participants | 174 | 165 | NA |
| SIV uptake: yes | 100 (57.5) | 70 (42.4) | .006 |
| SOC at month 6 | |||
| Precontemplation stage | 58 (33.3) | 73 (44.2) | NA |
| Contemplation stage | 16 (9.2) | 17 (10.3) | NA |
| Preparation stage | 0 | 5 (3.0) | NA |
| Action stage | 100 (57.5) | 70 (42.4) | .008 |
| SOC score, mean (SD)a | 2.8 (1.4) | 2.4 (1.4) | .01 |
| Changes in SOC score from baseline to month 6, mean (SD)a | 0.7 (1.0) | 0.4 (1.0) | .048 |
| Intention-to-treat analysis | |||
| Total participants | 198 | 198 | NA |
| SIV uptake: yes | 100 (50.5) | 70 (35.3) | .002 |
| SOC at month 6 | |||
| Precontemplation stage | 68 (34.3) | 88 (44.4) | NA |
| Contemplation stage | 18 (9.1) | 21 (10.6) | NA |
| Preparation stage | 0 (0) | 9 (4.5) | NA |
| Action stage | 112 (56.6) | 80 (40.4) | .001 |
| SOC score, mean (SD)a | 2.8 (1.4) | 2.4 (1.4) | .02 |
| Changes in SOC score from baseline to month 6, mean (SD)a | 0.7 (1.0) | 0.5 (1.0) | .04 |
Abbreviations: NA, not applicable; SIV, seasonal influenza vaccination; SOC, stage of change.
a
1 = Precontemplation stage, 2 = contemplation stage, 3 = preparation stage, and 4 = action stage. The χ2 tests were used to compare SIV uptake and SOC between the intervention group and the control group. Independent-sample, unpaired, 2-tailed t test was used to compare the SOC score and changes in the SOC score between the intervention group and the control group.