| Characteristic | Pneumococcal penicillin susceptibility | Total* 240 (100) | ||
| Susceptible120 (50) | Intermediate64 (27) | Resistant56 (23) | ||
| Age (months) | ||||
| 3–11 | 31 (26) | 31 (48) | 22 (39) | 84 (35) |
| 12–23 | 43 (36) | 21 (33) | 24 (43) | 88 (37) |
| 24–35 | 21 (17) | 10 (16) | 7 (12) | 38 (16) |
| 36–47 | 14 (12) | 2 (3) | 1 (2) | 17 (7) |
| 48–59 | 11 (9) | – | 2 (4) | 13 (5) |
| Sex (male) | 64 (53) | 36 (56) | 33 (59) | 133 (55) |
| Country of residence | ||||
| Argentina | 46 (38) | 32 (50) | 15 (27) | 93 (39) |
| Brazil | 56 (47) | 20 (31) | 8 (14) | 84 (35) |
| Dominican Republic | 18 (15) | 12 (19) | 33 (59) | 63 (26) |
| Urban residence | 108 (91) | 59 (94) | 49 (89) | 216 (91) |
| Day-care centre attendance | 14 (12) | 5 ( 8) | 6 (11) | 25 (11) |
| Hospitalisation in the past 12 months | 18 (16) | 16 (25) | 12 (21) | 46 (20) |
| Report of previous antibiotic use | 14 (12) | 21 (33) | 16 (30) | 51 (22) |
| Fever on admission | 89 (74) | 47 (73) | 35 (66) | 171 (72) |
| Tachypnoea on admission | 100 (85) | 51 (80) | 44 (82) | 195 (83) |
| Dyspnoea on admission | 89 (77) | 49 (77) | 49 (88) | 187 (79) |
| Hypoxaemia on admission | 67 (58) | 35 (57) | 35 (64) | 137 (59) |
| Pleural effusion on admission | 64 (53) | 32 (50) | 33 (59) | 129 (54) |
| Hospitalisation >5 days (no., %) | 95 (79) | 53 (83) | 39 (70) | 187 (78) |
| Mean (SD) haemoglobin (g/dl) on admission | 8.92 (±1.78) | 8.35 (±1.62) | 7.45 (±1.55) | 8.43 (±1.78) |
| Mean (SD) WBC (×103/l) on admission | 18.53 (±9.53) | 21.05 (±9.09) | 20.93 (±11.03) | 19.77 (±9.83) |
*Totals may not add up 240 owing to missing values.