Table 1. Clinical data of healthy volunteers included in the study.
| Characteristic | BCG-naïve, no. (%) | BCG-vaccinated, no. (%) |
| Total | 67 | 63 |
| Sex (female) | 28 (41.8%) | 28 (44.4%) |
| Gestational age, weeks, mean ± SD | 39.3 ± 1.2 | 39.3 ± 1.6 |
| Birth weight, grams, mean ± SD | 3472.3 ± 474.6 | 3429.0 ± 552.0 |
| Mode of delivery (vaginal birth) | 42 (62.7%) | 40 (63.5%) |
| Maternal age at delivery, years, mean ± SD | 32.9 ± 4.5 | 32.3 ± 4.3 |
| Age at blood sampling, days, mean ± SD | 428.4 ± 70.9 | 427.3 ± 57.3 |
| Measles, mumps, and rubella (MMR) vaccination before blood sampling |
53 (79.1%) | 48 (76.2%) |
| Household smoking in first year of life | 4 (6.0%) | 10 (16.1%) |
| Ethnicity | ||
| Caucasian | 56 (83.6%) | 51 (81.0%) |
| Asian | 0 | 3 (4.8%) |
| Other | 11 (16.4%) | 9 (14.3%) |
| Maternal BCG vaccination status | ||
| Yes | 11 (16.4%) | 10 (15.9%) |
| No | 51 (76.1%) | 49 (77.7%) |
| Not reported | 5 (7.5%) | 4 (6.4%) |
| Duration of breastfeeding | ||
| Never | 1 (1.5%) | 0 |
| <6 months | 19 (28.4%) | 18 (28.6%) |
| 6–12 months | 14 (20.9%) | 18 (28.6%) |
| >12 months | 33 (49.2%) | 25 (39.7%) |
| Unknown | 0 | 2 (3.2%) |
| Monocyte proportions | ||
| Classical | 86.0 ± 5.9 | 84.9 ± 5.1 |
| Intermediate | 5.5 ± 2.6 | 5.5 ± 2.7 |
| Nonclassical | 8.4 ± 4.7 | 9.3 ± 4.3 |