Table 2.
Uni- and Multivariate Risk Factor Analysis for Incidence of Microscopically Confirmed Plasmodium vivax Malaria Infections in LUP and CAH
| Infections | PY | Rate (Infections/100 PY) | IRR | Adjusted IRR | ||||
|---|---|---|---|---|---|---|---|---|
| Demographic | n | PY | Rate | 95% CI | IRR | 95% CI | IRR | 95% CI |
| Lupuna | - | - | - | - | - | - | - | - |
| Year | - | - | - | - | - | - | - | - |
| 2013 | 581 | 830.5 | 70.0 | 64.4–75.8 | Ref. | Ref. | ||
| 2014 | 679 | 751.6 | 90.3 | 83.7–97.3 | 1.3a | 1.2–1.4 | 1.3a | 1.2–1.4 |
| 2015 | 448 | 682.1 | 65.7 | 59.8–72.0 | 0.9 | 0.8–1.1 | 0.9 | 0.8–1.1 |
| Gender | - | - | - | - | - | - | - | - |
| Female | 871 | 1141.1 | 76.3 | 71.4–81.5 | Ref. | Ref. | ||
| Male | 837 | 1123.1 | 74.5 | 69.6–79.7 | 1.0 | 0.8–1.1 | 1.0 | 0.8–1.1 |
| Age | - | - | - | - | - | |||
| 3–7 y | 372 | 404.0 | 92.1 | 83.1–101.8 | 2.1a | 1.7–2.6 | ||
| 8–14 y | 436 | 341.5 | 127.7 | 116.1–140.1 | 3.0a | 2.5–3.8 | ||
| 15–44 y | 650 | 941.8 | 69.0 | 63.9–74.5 | 1.6a | 1.3–1.9 | ||
| >44 y | 250 | 576.9 | 43.3 | 38.2–49.0 | Ref. | |||
| Residency (Time) | - | - | - | - | - | - | ||
| 0–5 y | 468 | 458.9 | 102.2 | 93.1–111.5 | 1.5a | 1.3–1.8 | ||
| >5 y | 1240 | 1805.3 | 68.7 | 64.9–72.6 | Ref. | |||
| Interaction Agea Residency |
- | - | - | - | - | |||
| For Those With Residency 0–5 y | - | - | - | - | - | |||
| Age 3–7 y | - | - | - | - | - | 0.8 | 0.5–1.2 | |
| Age 8–14 y | - | - | - | - | - | 1.3 | 0.7–2.6 | |
| Age 15–44 y | - | - | - | - | - | 1.2 | 0.7–2.0 | |
| Age >44 y | - | - | - | - | - | Ref. | ||
| For Those With Residency >5 y | - | - | - | - | - | |||
| Age 3–7 y | - | - | - | - | - | 2.9a | 2.1–3.8 | |
| Age 8–14 y | - | - | - | - | - | 3.2a | 2.7–4.1 | |
| Age 15–44 y | - | - | - | - | - | 1.5a | 1.2–1.8 | |
| Age >44 y | - | - | - | - | - | Ref. | ||
| For Those Aged 3–7 y | - | - | - | - | - | |||
| Residency 0–5 y | - | - | - | - | - | 0.7b | 0.6–1.0 | |
| Residency >5 y | - | - | - | - | - | Ref. | ||
| For Those Aged 8–14 y | - | - | - | - | - | |||
| Residency 0–5 y | - | - | - | - | - | 1.1 | 0.7–1.7 | |
| Residency >5 y | - | - | - | - | - | Ref. | ||
| For Those Aged 15–44 y | - | - | - | - | - | |||
| Residency 0–5 y | - | - | - | - | - | 2.3a | 1.7–3.0 | |
| Residency >5 y | - | - | - | - | - | Ref. | ||
| For Those Aged >44 y | - | - | - | - | - | |||
| Residency 0–5 y | - | - | - | - | - | 2.7a | 1.7–4.7 | |
| Residency >5 y | - | - | - | - | - | Ref. | ||
| Cahuide | ||||||||
| Year | ||||||||
| 2013 | 695 | 948.9 | 73.2 | 67.9–78.8 | Ref. | Ref. | ||
| 2014 | 136 | 860.0 | 15.8 | 13.3–18.6 | 0.2a | 0.2–0.3 | 0.2a | 0.2–0.3 |
| 2015 | 193 | 790.0 | 24.4 | 21.2–28.1 | 0.3a | 0.3–0.4 | 0.3a | 0.3–0.4 |
| Gender | ||||||||
| Female | 472 | 1276.1 | 37.0 | 33.8–40.4 | Ref. | Ref. | ||
| Male | 552 | 1322.8 | 41.7 | 38.4–45.3 | 1.1b | 1.0–1.3 | 1.1 | 1.0–1.3 |
| Age | ||||||||
| 3–7 y | 148 | 551.6 | 26.8 | 22.8–31.4 | Ref. | Ref. | ||
| 8–14 y | 249 | 575.8 | 43.2 | 38.1–48.9 | 1.5a | 1.2–2.0 | 1.4a | 1.1–1.7 |
| 15–44 y | 418 | 966.8 | 43.2 | 39.2–47.5 | 1.6a | 1.3–2.0 | 1.4a | 1.1–1.7 |
| >44 y | 209 | 504.8 | 41.4 | 36.1–47.3 | 1.5a | 1.2–2.0 | 1.3b | 1.0–1.7 |
| Residency (Time) | ||||||||
| 0–5 y | 437 | 1321.7 | 33.1 | 30.1–36.3 | Ref. | |||
| >5y | 587 | 1277.3 | 46.0 | 42.4–49.8 | 1.4a | 1.2–1.7 | 1.3a | 1.1–1.6 |
Abbreviations: CAH, Cahuide; CI, confidence interval; IRR, incident rate ratio; LUP, Lupuna; PY, person-years; Ref., reference; y, years.
a P < .05.
b P between .1 and .05.