Table 1.
Characteristics of study cohorts
| Overall | Infection-prone | Non-prone | P values (infection-prone vs. non-prone) |
||
|---|---|---|---|---|---|
| Total children | 754 (100%) | 74 (9.8%) | 680 (90.2%) | <0.0001 | |
|
| |||||
| Gender | |||||
| Female | 357 (47.3%) | 23(31.1%) | 334 (49.2%) | 0.003 | |
| Male | 397 (52.7%) | 51(68.9%) | 346 (50.8%) | ||
|
| |||||
| Race | |||||
| White | 520 (68.9%) | 61(82.4%) | 459 (67.5%) | 0.008 | |
| Non-white | 234 (32%) | 13 (17.6%) | 221 (32.5%) | ||
|
| |||||
| Brest feeding* | |||||
| > 6M | 104 (15.5%) | 3 (4.4%) | 101 (16.7%) | 0.52 | |
| < 6M | 181 (26.9%) | 23 (33.8%) | 158 (26.1%) | ||
| Formula | 387 (57.6%) | 42 (61.8%) | 345 (57.2%) | ||
|
| |||||
| Daycare attendance* | |||||
| Yes | 238 (34.2%) | 36 (62.1%) | 202 (31.7%) | <0.0001 | |
| No | 457 (65.8%) | 22 (37.9%) | 435 (68.3%) | ||
|
| |||||
| Sibling | |||||
| Yes | 472(62.6%) | 45 (61%) | 428 (62.9%) | 0.71 | |
| No | 282(37.4%) | 29 (39%) | 252 (37.1%) | ||
|
| |||||
| Home smoker | |||||
| Yes | 98(13.0%) | 5 (6.8%) | 93 (13.7%) | 0.10 | |
| No | 656 (90.2%) | 69 (93.2%) | 587 (86.3%) | ||
|
| |||||
| Total visits (samples) ** | 3398 (100%) | 542 (16.0%) | 2856 (84.0%) | <0.0001 | |
|
| |||||
| Visits of each healthy state group** | |||||
| Healthy | total visits | 2094 (61.6%) | 198 (36.5%) | 1896 (66.4%) | <0.0001 |
| visits per child | 2.78 | 2.67 | 2.79 | / | |
| URI | total visits | 673 (19.8%) | 95 (17.5%) | 578 (20.2%) | 0.15 |
| visits per child | 0.89 | 1.28 | 0.85 | / | |
| AOM | total visits | 631 (18.5%) | 249 (15.9%) | 382 (13.4%) | 0.12 |
| visits per child | 0.84 | 3.36 | 0.56 | / | |
*
daycare and breastfeeding date of some children were missing.
**
NP samples were collected at all visits