Table 3.
Admission Rates Between 4.5 and 9 Months of Age and Admission Hazard Rate Ratio (HRR) for Recipients of Early Measles Vaccine (Group A), Compared With Controls (Groups B and C), by Season of Enrollment
| NVAS Status, Season | Group A |
Groups B and C |
Admission HRR (95% CI) |
|||
|---|---|---|---|---|---|---|
| Admissions/100 Person-Years (Admissions/Person-Days), Children, No. | Enrolled Children, No. | Admissions/100 Person-Years (Admissions/Person-Days), Children, No. | Enrolled Children, No. | All Admissions | Excluding Measles Admissions | |
| Overall | ||||||
| Dry | 5.4 (21/142 294) | 1063 | 10.1 (80/287 701) | 2149 | 0.53 (0.33–0.86) | 0.62 (0.38–1.01) |
| Rainy | 9.6 (36/136 863) | 1066 | 11.2 (84/273 515) | 2139 | 0.86 (0.58–1.28) | 0.93 (0.63–1.38) |
| All | 7.5 (57/279 157) | 2129 | 10.7 (164/561 216) | 4288 | 0.70 (0.52–0.95) | 0.78 (0.58–1.07) |
| No NVAS | ||||||
| Dry | 5.2 (11/76 721) | 570 | 11.1 (47/154 524) | 1165 | 0.47 (0.24–0.91) | 0.54 (0.28–1.05) |
| Rainy | 6.4 (12/68 683) | 537 | 10.6 (42/144 804) | 1130 | 0.61 (0.32–1.15) | 0.67 (0.35–1.28) |
| All | 5.8 (23/145 404) | 1107 | 10.9 (89/299 328) | 2295 | 0.53 (0.34–0.84) | 0.60 (0.38–0.95) |
| NVAS | ||||||
| Dry | 5.6 (10/65 573) | 493 | 9.0 (33/133 177) | 984 | 0.62 (0.31–1.26) | 0.73 (0.36–1.51) |
| Rainy | 12.8 (24/68 180) | 529 | 11.9 (42/128 711) | 1009 | 1.09 (0.66–1.81) | 1.15 (0.69–1.91) |
| All | 9.3 (34/133 753) | 1022 | 10.5 (75/261 888) | 1993 | 0.90 (0.60–1.35) | 0.99 (0.66–1.50) |
Data are from the national pediatric ward, Guinea-Bissau. Early recipients received measles vaccine at 4.5 and 9 months of age, and controls received vaccine at 9 months of age.
Abbreviations: CI, confidence interval; NVAS, neonatal vitamin A supplementation.