Table 2.
Incidence per 1,000 vaccine doses of febrile convulsions with diagnostic certainty level 1–3 (Brighton collaboration), within 7 days after each dose | ||||||
---|---|---|---|---|---|---|
5–17months age category (children) |
6–12 weeks age category (infants) |
|||||
N | n | Incidence (95% CI) | N | n | Incidence (95% CI) | |
First 3 doses | ||||||
RTS,S/AS01 | 17,306 | 18 | 1.0 (0.6–1.6) | 12,739 | 2 | 0.2 (0.0–0.6) |
Control | 8728 | 5 | 0.6 (0.2–1.3) | 6403 | 3 | 0.5 (0.1–1.4) |
Dose 4 | ||||||
R3R | 2447 | 6 | 2.5 (0.9–5.3) | 1825 | 4 | 2.2 (0.6–5.6) |
R3C | 2472 | 3 | 1.2 (0.3–3.5) | 1837 | 0 | 0.0 (0.0–2.0) |
C3C | 2473 | 1 | 0.4 (0.0–2.3) | 1827 | 1 | 0.5 (0.0–3.0) |
SCCS Risk Ratio (95% CI) of febrile convulsions after each of the first 3 doses (5–17 months age category) | ||||||
Risk period | R3R | R3C | R3R+R3C | C3C | ||
3 days (days 0–2) | 3.8 (1.7–8.7) | 2.3 (0.8–6.0) | 3.0 (1.6–5.6) | 0.8 (0.2–3.5) | ||
7 days (days 0–6) | 1.9 (0.9–4.2) | 2.2 (1.0–4.9) | 2.1 (1.2–3.6) | 1.1 (0.4–2.8) | ||
SCCS Risk Ratio (95% CI) of febrile convulsions post-dose 4 (5–17 months age category) | ||||||
Risk period | R3R | R3C | C3C | |||
3 days (days 0–2) | 6.0 (2.1–16.9) | 4.5 (0.4–49.6) | 0.0 | |||
7 days (days 0–6) | 2.9 (1.0–7.9) | 6.6 (0.6–72.5) | 0.4 (0.1–2.9) |
R3R, group receiving 4 doses of RTS,S/AS01; R3C, group receiving 3 doses of RTS,S/AS01 plus 1 dose of control vaccine; C3C, group receiving 4 doses of control vaccine; N, total number of vaccine doses administered in the group; n, number of vaccine doses followed by febrile convulsions; CI, confidence interval. Risk ratio is the risk ratio of the self-controlled case-series (SCCS) analysis, comparing the incidence in a given risk period (3 and 7 days post-vaccination) to the incidence in the corresponding control period (day 4–30 and day 8–30 post-vaccination, respectively).