Table 1.
Site characteristics, the Pregnancy and Influenza Multinational Epidemiologic Study
| Bangkok, Thailand | Lima, Peru | Nagpur, India | |
|---|---|---|---|
| Primary research institution(s) | Queen Sirikit National Institute of Child Health, Thailand Ministry of Public Health Thailand Ministry of Public Health—US Centers for Disease Control and Prevention Collaboration |
U.S. Naval Medical Research Unit No. 6 (NAMRU-6) | Lata Medical Research Foundation |
| Study laboratorya | Armed Forces Research Institute of Medical Sciences | NAMRU-6 Virology and Emerging Infections Laboratory | Dhruv Pathology and Diagnostic Laboratory (year 1) |
| Source population | Pregnant women attending outpatient prenatal care visits at study hospitals | Pregnant women attending outpatient prenatal care visits at study hospitals | Pregnant women from urban Nagpur attending outpatient prenatal care visits at study hospitals |
| Study hospitals | |||
| Number | 2 | 4 | 1 |
| Types | Tertiary/referral | Tertiary/referral | Secondary/referral |
| Institutions (deliveries/year) | Nopparat Hospital (6000) Rajavithi Hospital (6000-7000) |
Peruvian Maternal and Perinatal Institute (22000) Arzobispo Loayza National Hospital (4000) Dos de Mayo National Hospital (4000) San Bartolome Hospital (7000) |
Daga Memorial Government Women’s Hospital (14000-15000) |
| Start date of local influenza seasonb (epidemiologic week) | 28 | 18 | 26 |
aStudy laboratories process and test respiratory specimens for influenza viruses by reverse transcription polymerase chain reaction (RT-PCR) using US Centers for Disease Control and Prevention protocols. In Thailand, the study laboratory also tests for respiratory syncytial viruses and human metapneumoviruses by RT-PCR
bFor the purposes of recruitment and enrollment, the ‘influenza season’ is defined as the 16 week time period in which influenza epidemics are most likely to occur as predicted by local influenza virus surveillance data from previous years