Table 4.
Results
| Control (n=85) | Intervention (n=85) | Crude estimate of effect | Adjusted* estimate of effect | 95% CI | p Value | |
|---|---|---|---|---|---|---|
| Primary outcome | ||||||
| All page views | ||||||
| Total | 449 | 1162 | ||||
| Incidence rate | 5.28 | 13.67 | 2.59† | 2.71 | 2.20 to 3.33 | <0.001 |
| Secondary outcome | ||||||
| Unique page views | ||||||
| Total | 403 | 1058 | ||||
| Incidence rate | 4.74 | 12.45 | 2.63† | 2.74 | 2.24 to 3.35 | <0.001 |
| Entrances | ||||||
| Total | 260 | 821 | ||||
| Incidence rate | 3.06 | 9.66 | 3.16† | 3.36 | 2.68 to 4.22 | <0.001 |
| 100% of visits were single page | ||||||
| No | 53 | 71 | ||||
| Yes | 24 | 14 | 0.44‡ | 0.41 | 0.19 to 0.88 | 0.023 |
| Direct click visits | ||||||
| Total | 26 | 168 | ||||
| Incidence rate | 0.31 | 1.98 | 6.46† | 6.74 | 4.11 to 11.08 | <0.001 |
| Twitter referrals | ||||||
| Total | 0 | 297 | ||||
| Incidence rate | 0 | 3.49 | − | − | − | − |
| Any outbound click events | ||||||
| No | 60 | 39 | ||||
| Yes | 25 | 46 | 2.83‡ | 3.20 | 1.63 to 6.31 | 0.001 |
| Time on page in seconds | ||||||
| Arithmetic mean (SD) | 147 (232) | 164 (210) | ||||
| Median (min, max) | 51 (0, 1283) | 109 (0, 1610) | ||||
| Geometric mean | 31 | 76 | 2.42§ | 2.47 | 1.32 to 4.61 | 0.005 |
*Adjusted for baseline activity and day of week.
†Incidence rate ratio.
‡OR.
§Ratio of geometric means.