Table 2.
Dichotomous Independent Variables and Median Engagement on Twitter.
| Engagement variable | Season | Variable | Median present | Median absent | U | P-value |
|---|---|---|---|---|---|---|
| Retweets | Early | Visual | 2.00 | 0.00 | 41 782.000 | <.001 |
| Likes | Early | Visual | 3.00 | 0.00 | 41 215.500 | <.001 |
| Retweets | Early | Web link | 2.00 | 0.00 | 41 261.500 | <.001 |
| Likes | Early | Web link | 2.00 | 1.00 | 38 827.500 | .003 |
| Retweets | Early | Healthcare professionals promote flu vax | 2.00 | 1.00 | 30 079.500 | .002 |
| Likes | Early | Healthcare professionals promote flu vax | 4.00 | 1.00 | 31 475.500 | <.001 |
| Retweets | Early | Specific populations flu vax | 0.50 | 1.00 | 27 869.500 | .002 |
| Likes | Early | Specific populations flu vax | 0.00 | 3.00 | 24 632.500 | <.001 |
| Retweets | Peak | Healthcare professionals promote flu vax | 2.00 | 0.00 | 20 980.000 | .001 |
| Likes | Peak | Healthcare professionals promote flu vax | 2.00 | 0.00 | 21 267.500 | .001 |
| Retweets | Early | Flu susceptibility | 4.50 | 1.00 | 17 375.500 | .003 |
| Likes | Early | Flu susceptibility | 6.00 | 2.00 | 17 032.000 | .009 |
| Retweets | Early | Flu vax uptake self-efficacy | 3.00 | 1.00 | 32 992.000 | <.001 |
| Likes | Early | Flu vax uptake self-efficacy | 4.00 | 1.00 | 32 687.000 | .001 |
| Retweets | Peak | Flu vax uptake self-efficacy | 2.00 | 1.00 | 18 030.000 | .013 |