Risk factors | Variable | Number of carriers (total number of children) | Carriage rate % (95% CI) | P-valueb |
---|---|---|---|---|
Sex | Female | 90 (214) | 42.1 (35.4–48.7) | 1.00 |
Male | 78 (224) | 34.8 (28.6–41.1) | 0.14 | |
Age, months | ≤18 | 1 (12) | 8.3 (7.30–24.0) | 1.00 |
19 - ≤36 | 55 (109) | 50.5 (41.1–59.8) | 0.02 | |
37 - ≤59 | 73 (188) | 38.8 (31.6–45.8) | 0.06 | |
≥60 | 39 (129) | 30.2 (22.3–38.2) | 0.01 | |
Birth weight, g | < 2500 | 11 (30) | 36.7 (19.4–54.0) | 1.00 |
≥2500 | 146 (384) | 38.0 (33.1–42.9) | 0.88 | |
Birth height, cm | < 48 | 10 (20) | 50.0 (28.1–71.9) | 1.00 |
≥48 | 146 (397) | 36.8 (32.0–41.5) | 0.24 | |
Breastfeeding | None or < 3 months | 32 (62) | 51.6 (39.2–64.1) | 1.00 |
≥3 months | 136 (208) | 65.4 (58.9–71.8) | 0.14 | |
Living in Arkhangelsk since birth | Yes | 152 (395) | 38.5 (33.7–43.3) | 1.00 |
No | 11 (37) | 29.7 (15.0–44.5) | 0.38 | |
Any disease within a month prior study | Yes | 115 (302) | 38.1 (32.6–43.4) | 1.00 |
No | 52 (131) | 39.7 (31.3–48.1) | 0.75 | |
Average number of respiratory tract infections per year since birth | Never or rare | 31 (88) | 33.7 (23.9–43.5) | 1.00 |
Less than 6 times per year | 77(211) | 37.5 (30.9–44.0) | 0.76 | |
More than 6 times per year | 58 (135) | 42.2 (33.8–50.6) | 0.58 | |
Regular medication | Yes | 15 (36) | 41.7 (25.6–57.8) | 1.00 |
No | 149 (394) | 37.8 (33.0–42.6) | 0.72 | |
Highest education parent(s) | Secondary professional school or higher | 225 (604) | 37.3 (33.4–41.1) | 1.00 |
Secondary, primary or non-specified | 86 (207) | 41.5 (34.8–48.3) | 0.31 | |
Sibling(s) < 5 years | Yes | 28 (68) | 41.2 (29.5–52.9) | 1.00 |
No | 137 (234) | 58.5 (50.5–66.6) | 0.06 | |
Number of rooms | 1–2 | 92 (262) | 35.1 (29.3–40.9) | 1.00 |
≥3 | 74 (173) | 42.8 (35.4–50.2) | 0.47 | |
Passive smoking | Yes | 111 (189) | 58.7 (51.7–65.7) | 1.00 |
No | 48 (125) | 38.4 (29.9–46.9) | 0.12 |