Table 5. Multivariable predictors for time to P. vivax and P. falciparum clinical episodes.
Variable | P. vivax | P. falciparum | ||||
---|---|---|---|---|---|---|
AHR* | CI95 | p-value | AHR* | CI95 | p-value | |
PQ treatment | 0.76 | 0.34–1.68 | 0.497 | 1.79 | 1.05–3.03 | 0.031 |
P. vivax molFOB‡ | 1.07 | 1.04–1.09 | <0.001 | n.a. | n.a. | n.a. |
P. falciparum molFOB‡ | n.a. | n.a. | n.a. | 1.15 | 1.11–1.21 | <0.001 |
Age | 0.62 | 0.46–0.84 | 0.002 | 0.98 | 0.85–1.13 | 0. 799 |
LLIN use at enrolment | 0.84 | 0.24–2.88 | 0.778 | 0.44 | 0.22–0.87 | 0.018 |
Hb at enrolment (g/dl) | 0.95 | 0.74–0.67 | 0.668 | 0.85 | 0.71–1.01 | 0.070 |
Village | ||||||
Albinama (ref) | 1 | 1 | ||||
Amahup | 0.89 | 0.23–3.46 | 0.871 | 0.65 | 0.20–2.08 | 0.465 |
Balif | 1.48 | 0.45–4.86 | 0.518 | 1.26 | 0.50–3.14 | 0.626 |
Balanga | 0.85 | 0.21–3.53 | 0.827 | 1.39 | 0.59–3.30 | 0.455 |
Bolumita | 0.99 | 0.24–4.03 | 0.987 | 1.32 | 0.58–3.03 | 0.508 |
Numangu | 1.00 | 0.23–4.31 | 0.997 | 4.29 | 2.06–8.97 | <0.001 |
Infection status at enrolment (by qPCR) | ||||||
Uninfected (ref) | 1 | 1 | ||||
P. vivax | 0.77 | 0.29–2.07 | 0.608 | 1.64 | 0.91–2.95 | 0.101 |
P. falciparum | 1.74 | 0.59–5.11 | 0.316 | 0.97 | 0.34–2.77 | 0.954 |
Mixed P.f. or P.v. | 1.59 | 0.56–4.50 | 0.381 | 1.24 | 0.57–2.68 | 0.582 |
* AHRs were modeled using multiple failure Cox proportional hazard regression.
† n.a., not applicable.
‡ Average molFOB until the time of failure (time-varying covariate).
PQ: Primaquine; LLIN: long-lasting insecticide-treated net; Hb: haemoglobin.