Variables | Cases (n = 407) N (%) | Controls (n = 407) N(%) | p-value | OR | 95 % CI | |
---|---|---|---|---|---|---|
Sex | Female | 194 (47.7) | 141 (34.6) | 1 | ||
Male | 213 (52.3) | 266 (65.4) | <0.01 | 0.58 | 0.44–0.77 | |
Age | ≥1 year | 241 (59.2) | 324 (79.6) | 1 | ||
<1 year | 166 (40.8) | 83 (20.4) | <0.01 | 2.68 | 1.97–3.67 | |
Birth weighta | >2500 g | 327 (87.9) | 329 (85.5) | 1 | ||
<2500 g | 45 (12.1) | 56 (14.5) | 0.32 | 0.80 | 0. 53–1.23 | |
Prematurityb | No | 346 (91.0) | 349 (89.3) | 1 | ||
Yes | 34 (9.0) | 42 (10.7) | 0.40 | 0.82 | 0.51–1.31 | |
Respiratory disease /previous allergy | No | 367 (90.2) | 374 (91.9) | 1 | ||
Yes | 40 (9.8) | 33 (8.1) | 0.40 | 1.22 | 0.76–1.99 | |
Previous hospitalizationc | No | 326 (81.7) | 355 (87.2) | 1 | ||
Yes | 73 (18.3) | 52 (12.8) | 0.03 | 1.53 | 1.04–2.24 | |
Exclusive Breastfeeding (4–6 months)d | Yes | 203 (49.9) | 212 (52.8) | 1 | ||
No | 204 (50.1) | 192 (47.2) | 0.53 | 1.09 | 0.83–1.44 | |
Nutritional status (Weight-for-age Ratio) d | (> -2 z score) | 362 (89.2.) | 383 (94.1) | 1 | ||
(≤ -2 z score) | 44 (10.8) | 24 (5.9) | 0.01 | 1.93 | 115–3.23 | |
10-valent pneumococcal conjugated vaccine | Vaccinated | 254 (62.4.) | 258 (63.4) | 1 | ||
unvaccinated | 153 (37.6.) | 149 (36.6) | 0.77 | 1.04 | 0.78–1.38 | |
Influenza virus vaccine | Vaccinated | 172 (42.3) | 289 (71.0) | 1 | ||
unvaccinated | 235 (57.7) | 118 (29.0) | <0.01 | 3.34 | 2.50–4.48 |