From: Hospital-based prospective study of pertussis in infants and close contacts in Tehran, Iran
 |  | Total | Asymptomatic | Symptomatic at inclusion | Symptomatic during study |
---|---|---|---|---|---|
N = 53 | N = 15 (28.3%) | N = 36 (67.9%) | N = 2 (3.8%) | ||
Age | |||||
 | median (IQR) | 31 (18-36) | 31 (24-35) | 30.5 (10.5-36) | 46.5 |
 | min-max | 2-59 | 12-57 | 2-59 | 41-52 |
Relationship with index | |||||
 Mothers | n (%) | 18 (34.0) | 6 (40.0) | 12 (33.4) | 0 (0) |
 Fathers | n (%) | 17 (32.1) | 7 (46.7) | 9 (25.0) | 1 (50.0) |
 Siblings (<10 yoa) | n (%) | 9 (17.0) | 0 (0) | 9 (25.0) | 0 (0) |
 Siblings (≥10 yoa) | n (%) | 4 (7.6) | 1 (6.7) | 3 (8.3) | 0 (0) |
 Gdfathers/Gdmothersb | n (%) | 3 (5.7) | 1 (6.7) | 1 (2.8) | 1 (50.0) |
 Nurses | n (%) | 2 (3.8) | 0 (0) | 2 (5.6) | 0 (0) |
Pertussis diagnosis | |||||
 PCR+ only | n (%) | 36 (67.9) | 12 (80.0) | 22 (61.1) | 2 (100) |
 Serology+ only | n (%) | 9 (17.0) | 2 (13.3) | 7 (19.4) | 0 (0) |
 PCR+ and serology+ | n (%) | 8 (15.1) | 1 (6.7) | 7 (19.4) | 0 (0) |
Pertussis vaccination history | |||||
 Siblings <10 yo* | n | 9 | 0 | 9 | 0 |
  Non-vaccinated | n (%) | 2 (22.2) | - | 2 (22.2) | - |
  Vaccinated | n (%) | 7 (77.8) | - | 7 (77.8) | - |
  >> unknown doses | n (%) | 3 (42.9) | - | 3 (42.9) | - |
  >> 4 doses | n (%) | 4 (57.1) | - | 4 (57.1) | - |
Macrolide treatment before inclusion | |||||
 No | n (%) | 26 (49.1) | 8 (53.3) | 17 (42.2) | 1 (50.0) |
 Yes | n (%) | 17 (32.1) | 2 (13.3) | 14 (38.9) | 1 (50.0) |
 Unknown | n (%) | 10 (18.9) | 5 (33.3) | 5 (13.9) | 0 (0) |