Table 3 Malaria incidence rates for the intervention arms for some background variables
Intervention arm | |||||||||
|---|---|---|---|---|---|---|---|---|---|
IRS + LLIN | LLIN | IRS | |||||||
Malaria episodes | Person years | Incidence (95% CI) | Malaria episodes | Person years | Incidence (95% CI) | Malaria episodes | Person years | Incidence (95% CI) | |
Malaria episodes | |||||||||
First episode (cases) | 287 | 18,376 | 15.6 (13.9–17.5) | 254 | 16,972 | 15.0 (13.2–16.8) | 261 | 16,869 | 15.5 (13.7–17.4) |
All malaria episodes | 321 | 18,713 | 17.2 (15.3–19.1) | 278 | 17,244 | 16.1 (14.3–18.1) | 291 | 17,153 | 17.0 (15.1–19.0) |
P. falciparum | 180 | 18,713 | 9.6 (8.2–11.0) | 173 | 17,243 | 10.0 (8.5–11.5) | 153 | 17,154 | 8.9 (7.5–10.3) |
P. vivax | 86 | 18,713 | 4.6 (3.6–5.6) | 69 | 17,243 | 4.0 (3.1–4.9) | 68 | 17,154 | 4.0 (3.0–4.9) |
Mixed (Pf + Pv) | 57 | 18,713 | 3.0 (2.3–3.8) | 36 | 17,243 | 2.1 (1.4–2.8) | 68 | 17,154 | 4.0 (3.0–4.9) |
Age | |||||||||
0–5 years | 79 | 3252 | 24.3 (18.9–29.6) | 83 | 3105 | 26.7 (21.4–33.0) | 54 | 2951 | 18.3 (13.9–23.7) |
6–15 years | 103 | 5975 | 17.2 (14.1–20.8) | 91 | 5933 | 15.3 (12.2–18.5) | 83 | 5840 | 14.2 (11.2–17.3) |
Older than 16 years | 139 | 9481 | 14.7 (12.4–17.3) | 104 | 8206 | 12.7 (10.4–15.3) | 154 | 8360 | 18.4 (15.5–21.3) |
Time period | |||||||||
Week 1–26 | 83 | 4071 | 21.1 (17.0–26.0) | 56 | 3738 | 15.0 (11.1–19.0) | 75 | 3839 | 19.5 (15.1–24.0) |
Week 26–52 | 76 | 4114 | 18.5 (14.3–22.6) | 61 | 3765 | 16.2 (12.1–20.3) | 54 | 3789 | 14.3 (10.5–18.1) |
Week 53–79 | 62 | 4091 | 15.2 (11.4–19.0) | 59 | 3786 | 15.6 (11.6–20.0) | 64 | 3682 | 17.4 (13.1–21.6) |
Weeks 79–121 | 100 | 6437 | 15.5 (12.5–18.6) | 102 | 5954 | 17.1 (13.8–20.5) | 98 | 5845 | 16.8 (13.5–20.1) |
Clustering | |||||||||
Cluster area | 104 | 2720 | 38.2 (31.4–46.1) | 126 | 2735 | 46.1 (38.5–54.7) | 169 | 3513 | 48.1 (41.2–55.8) |
Non-cluster area | 217 | 15,993 | 13.6 (11.9–15.5) | 152 | 14,509 | 10.5 (8.9–12.2) | 122 | 13,639 | 8.9 (7.5–10.6) |
LLIN use | |||||||||
Over 50% | 13 | 551 | 23.6 (13.1–39.3) | 13 | 449 | 29 (16.1–48.3) | 0 | 9 | 0.0 |
25–49% | 80 | 5618 | 14.2 (11.3–17.6) | 72 | 5224 | 13.8 (10.9–17.3) | 7 | 135 | 52 (22.7–102.6) |
0–24% | 228 | 12,543 | 18.2 (15.9–20.7) | 193 | 11,571 | 16.7 (14.5–19.2) | 284 | 17,010 | 16.7 (14.8–18.7) |
Control | Total | |||||
|---|---|---|---|---|---|---|
Malaria episodes | Person years | Incidence (95% CI) | Malaria episodes | Person years | Incidence (95% CI) | |
Malaria episodes | ||||||
First episode (cases) | 257 | 18,441 | 13.9 (12.3–15.7) | 1059 | 70,658 | 15.0 (14.1–15.9) |
All malaria episodes | 293 | 18,752 | 15.6 (13.9–17.5) | 1183 | 71862 | 16.5 (15.5–17.4) |
P. falciparum | 146 | 18,752 | 7.8 (6.5–9.0) | 652 | 71,862 | 9.1 (8.4–9.8) |
P. vivax | 76 | 18,752 | 4.1 (3.1–5.0) | 299 | 71,862 | 4.2 (3.7–4.6) |
Mixed (Pf + Pv) | 71 | 18,752 | 3.8 (2.9–4.7) | 232 | 71,862 | 3.3 (2.8–3.6) |
Age | ||||||
0–5 years | 54 | 3429 | 15.7 (11.6–20.0) | 270 | 12,742 | 21.2 (18.6–23.7) |
6–15 years | 98 | 5979 | 16.4 (13.2–20.0) | 375 | 23,727 | 15.8 (14.2–17.4) |
Older than 16 years | 141 | 9344 | 15.1 (12.6–17.6) | 538 | 35,393 | 15.2 (13.9–16.5) |
Time period | ||||||
Week 1–26 | 78 | 4107 | 19.0 (14.8–23.2) | 292 | 15,755 | 18.5 (16.4–20.7) |
Week 26–52 | 60 | 4112 | 15.0 (11.0–18.3) | 251 | 15,780 | 16.0 (14.0–18.0) |
Week 53–79 | 71 | 4 087 | 17.4 (13.3–21.4) | 256 | 15,646 | 16.4 (14.4–18.4) |
Weeks 79–121 | 84 | 6445 | 13.0 (10.3–16.0) | 384 | 24,681 | 15.6 (14.0–17.1) |
Clustering | ||||||
Cluster area | 156 | 3,704 | 42.1 (35.9–49.1) | 484 | 12,672 | 38.2 (34.9–41.7) |
Non-cluster area | 137 | 15,049 | 9.1 (7.6–10.7) | 575 | 59,190 | 9.7 (8.9–10.5) |
LLIN use | ||||||
Over 50% | 0 | 0 | 0.0 | 26 | 1009 | 25.8 (17.2–37.2) |
25–49% | 3 | 94 | 32 (8.1–86.9) | 162 | 11,071 | 14.6 (12.5–17.0) |
0–24% | 290 | 18,658 | 15.5 (13.8–17.4) | 995 | 59,782 | 16.6 (15.6–17.7) |