Table 1. Short-term changes in search volume index before and after each campaign.
‡SD: standard deviation
*p-values calculated using an independent t-test
| Queried term | Representative campaign/event | 15 days before campaign (mean (SD‡)) | 15 days after campaign (mean (SD)) | p* |
| Brachytherapy | ABS announcement | 53.33 (23.375) | 52.13 (27.084) | 0.898 |
| “ThisIsBrachytherapy” first Twitter campaign | 38.53 (30.043) | 46.00 (23.788) | 0.448 | |
| “ThisIsBrachytherapy” second Twitter campaign | 38.35 (24.749) | 38.07 (29.380) | 0.976 | |
| ALS | ALS “Ice Bucket Challenge” | 3.33 (0.594) | 34.21 (31.222) | 0.003 |
| Ben Stiller | Ben Stiller announced prostate cancer diagnosis | 9.93 (3.575) | 25.75 (27.598) | 0.038 |
| Prostate cancer | 42.00 (8.468) | 51.81 (18.922) | 0.076 | |
| Angelina Jolie | Angelina Jolie announced prophylactic double mastectomy surgery | 2.85 (0.689) | 20.06 (26.973) | 0.022 |
| Breast cancer | 51.77 (6.870) | 55.19 (18.086) | 0.526 |