Table 1.
Demographic Characteristics of participants*
| Characteristics | IMIIV | MNPIIV-HCW | MNPIIV-self | MNPplacebo | All |
|---|---|---|---|---|---|
|
| |||||
| Age, year | |||||
| Mean | 29.6+/− 6.9 | 27.4+/−5.9 | 31.4+/−8.4 | 29.3+/−8.4 | 29.4+/−7.5 |
| Median | 29 | 26 | 26 | 26 | 26 |
| Range | 21–49 | 18–43 | 22–47 | 21–49 | 18–49 |
|
| |||||
| Sex, no. (%) | |||||
| Male | 14 (56%) | 13 (52%) | 13 (52%) | 13 (52%) | 53 (53%) |
| Female | 11 (44%) | 12 (48%) | 12 (48%) | 12 (48%) | 47 (47%) |
|
| |||||
| Ethnic Origin**, no. (%) | |||||
| White | 12 (48%) | 11 (44%) | 14 (56%) | 12 (48%) | 49 (49%) |
| Black | 8 (32%) | 8 (32%) | 8 (32%) | 7 (28%) | 31 (31%) |
| Other | 5 (20%) | 6 (24%) | 3 (12%) | 6 (24%) | 20 (20%) |
|
| |||||
| BMI, kg/m2 | |||||
| Mean | 24.9 +/− 4.3 | 25.0+/−4.5 | 25.7+/−4.0 | 24.6+/−4.6 | 25.0+/−4.3 |
| Median | 24.8 | 24.5 | 25.7 | 23.8 | 24.6 |
| Range | 17.4–34.2 | 19.2–35.0 | 18.7–34.2 | 18.4–34.1 | 17.1–35.0 |
|
| |||||
| Prior IIV | |||||
| 2013–2014 season, no. (%) | 4 (16%) | 6 (24%) | 7 (28%) | 6 (24%) | 23 (23%) |
| 2012–2013 season, no. (%) | 6 (24%) | 3 (12%) | 6 (24%) | 4 (16%) | 19 (19%) |
| Any of these 2 seasons, no. (%) | 8 (32%) | 7 (28%) | 9 (36%) | 9 (36%) | 33 (33%) |
BMI: body mass index
IIV: inactivated influenza vaccine
Plus–minus values are means+/− SD.
*
All participants were vaccinated between June 23 and September 25, 2015
**
Ethnic origin was self-reported.