Table 2. Basic demographic and underlying medical conditions for adults with severe acute respiratory infections (SARI) and asymptomatic adults.
| Bangladesh | China | Egypt | Guatemala | Kenya | Thailand | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SARI patient (n = 499) % | Asymptomatic adults (n = 198) % | SARI patient (n = 537) % | Asymptomatic adults (n = 216) % | SARI patient (n = 504) % | Asymptomatic adults (n = 209) % | SARI patient (n = 304) % | Asymptomatic adults (n = 174) % | SARI patient (n = 187) % | Asymptomatic adults (n = 121) % | SARI patient (n = 357) % | Asymptomatic adults (n = 217) % | |
| Enrollment period | January 2014-December 2014 | December 2013-March 2015 | February 2014-February 2015 | October 2013-October 2015 | February 2014-April 2015 | April 2014-August 2015 | ||||||
| Age (years) | ||||||||||||
| 18–49 | 50.3 | 50.5 | 77.1 | 76.9 | 56.2 | 54.1 | 38.7 | 37.4 | 59.4 | 69.4 | 22.1 | 24.4 |
| 50–64 | 26.5 | 26.3 | 14.5 | 14.4 | 33.7 | 33.5 | 27.6 | 28.2 | 21.4 | 16.5 | 30.3 | 31.8 |
| 65+ | 23.3 | 23.2 | 8.4 | 8.8 | 10.1 | 12.4 | 33.4 | 34.5 | 19.3 | 14.1 | 47.6 | 43.8 |
| Median years | 48 | 49 | 33 | 40 | 45 | 45 | 57 | 54 | 39 | 39 | 64 | 60 |
| Male | 64.3 | 67.7 | 57.8 | 51.9 | 47.6 | 56.5 | 32.2 | 51.7 | 32.1 | 18.2 | 45.1 | 36.9 |
| Medical Historya | ||||||||||||
| Current smoker | 19.4 | 22.7 | 24.9* | 45.1 | 22.0 | 25.4 | 6.2* | 19.0 | 7.5 | 4.1 | 20.5* | 11.1 |
| HIV/AIDS | 0 | 0 | 0 | 0 | 0 | 0 | 2.0 | 0 | 39.6* | 57.9 | 1.7 | 0 |
| Asthma | 24.5* | 0 | 0.4 | 0 | 5.8* | 1.0 | 26.6* | 1.2 | 5.4* | 0 | 15.4* | 2.8 |
| COPD/Chronic bronchitis | 12.2* | 1.0 | 2.2 | 1.4 | 1.6 | 0 | 4.6* | 0 | 1.6 | 0 | 13.2* | 0.5 |
| Diabetes | 5.0* | 1.0 | 1.1 | 1.9 | 9.5 | 5.3 | 17.4* | 10.3 | 2.7 | 0 | 17.7 | 12.0 |
| Malaria | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 27.8* | 2.5 | 0 | 0 |
| Immunosuppressionb | 13.0* | 0 | 0 | 0 | 0 | 0 | 6.3* | 0 | 2.7* | 15.7 | 5.0* | 1.4 |
a Self-reported medical history with the exception of malaria and HIV/AIDS in Kenya which was documented in medical records
b Examples include: receiving chemotherapy, documented as having an autoimmune disease, use of oral or injection corticosteroids for at least 14 days within 2 weeks of enrollment.
*indicates statistically significant (p<0.05) difference between case and control for medical history variable in that site (based on two-sample chi-square test or Fisher’s exact test).