Table 1.
Optimal features for influenza-like illness surveillance.
| Query | Query reference | Coefficient | ||
|
|
|
Lag-2 | Lag-1 | Lag 0 |
| (Intercept) |
|
0.332 | 0.321 | 0.497 |
| A hyeong influenza [influenza A type] | Social media; query recommendation | 0.745 | 0 | 0.109 |
| A hyeong dokgam [influenza A type] | Social media; query recommendation | 4.928 | 20.154 | 21.503 |
| A hyeong inpeulruenja [influenza A type] | Social media; query recommendation | 0.065 | 0.761 | 1.127 |
| B hyeong influenza [influenza B type] | Social media query; recommendation | 0 | 0 | 0.345 |
| B hyeong dokgam [influenza B type] | Social media; query recommendation | 0 | 0.029 | 1.447 |
| Influenza A | Social media; query recommendation | 2.345 | 0.086 | 0 |
| Influenza A hyeong [influenza A type] | Social media; query recommendation | 1.894 | 0.927 | 0.029 |
| Vaccine | Social media | 0 | 0 | –0.1151 |
| Geongang [health] | Social media | 0.393 | 0.395 | 0.109 |
| Dokgamgamyeom [flu infection] | Social media | 0.052 | 0 | 0 |
| Dokgamgeomsa [flu check] | Social media; query recommendation | 4.303 | 8.893 | 4.402 |
| Dokgam gyeokrigigan [flu isolation period] | Query recommendation | 0 | 0 | 0.177 |
| Dokgam gichim [flu cough] | Social media; chief concern | 0 | 0 | 1.106 |
| Dokgam baireoseu [flu virus] | Social media; query recommendation | 0 | 0 | –0.220 |
| Dokgam yeol [flu fever] | Chief concern | 0.391 | 0 | 0 |
| Dokgam yebang [flu prevention] | Social media; query recommendation | 0 | 0 | –0.152 |
| Dokgam yebangjeopjong [flu vaccination] | Social media; query recommendation | 0 | 0 | –0.1174 |
| Dokgam ipwon [flu hospitalization] | Social media; query recommendation | 0 | 0 | 1.470 |
| Dokgam jeonyeom [flu infection] | Social media; query recommendation | 0 | 0 | 2.569 |
| Dokgam jeonpa [flu dissemination] | Social media; query recommendation | 0.547 | 0.322 | 0.017 |
| Dokgam pyeryeom [flu pneumonia] | Social media ; chief concern | 0 | 0 | 0.005 |
| Dokgam hakgyo [flu school] | Social media | 0 | 0.122 | 0 |
| Dokgam hwanja [flu patient] | Social media | 0.066 | 0 | 0 |
| Soa dokgamjeungsang [child flu symptoms] | Query recommendation | 0.811 | 0.323 | 0.135 |
| Sinjongpeulru jeungsang [new flu symptoms] | Social media; query recommendation | 55.980 | 46.156 | 58.415 |
| Simhangamgi [severe cold] | Social media | 0 | 0 | 0.031 |
| Eorini dokgamyuhaeng [child flu epidemic] | Query recommendation | 0 | 0 | 0.002 |
| Onmomi apeum [whole body pain] | Chief concern | 0 | 0.038 | 0.072 |
| Inpeulruenja geomsa [influenza check] | Social media; query recommendation | 0 | 0.233 | 0 |
| Inpeulruenja yak [influenza medicine] | Social media; query recommendation | 0 | 0 | –0.005 |
| Inpeulruenja yuhaeng [influenza epidemic] | Social media | 0 | 0 | 0.003 |
| Inpeulruenja jeungsang [influenza symptoms] | Social media; query recommendation | 6.254 | 0 | 0 |
| Inpeulruenja jeungse [influenza symptoms] | Social media; query recommendation | 0 | 0 | 0.209 |
| Junggukdokgam [China influenza] | Query recommendation | 0 | 0 | –0.056 |
| Tamipeulru [Tamiflu] | Social media: query recommendation | 0 | 0 | 0.517 |
| Peulru [flu] | Seed keyword | 0.621 | 0.562 | 0.339 |