Table 2 Incidence rate and incidence rate ratio (IRR) of P. vivax and P. falciparum, south-central Ethiopia, October2014 to January 2017
From: Older children are at increased risk of Plasmodium vivax in south-central Ethiopia: a cohort study
Variables (n = 34,548) | Person-years | P. vivax | P. falciparum | |||||
|---|---|---|---|---|---|---|---|---|
No. of episode | IR/1000 PY | IRR | No. of episode | IR/1000 PY | IRR | |||
All | 71,859.1 | 531 | 7.39 | 884 | 12.30 | |||
Sex | ||||||||
Male | 36,180.4 | 259 | 7.16 | 1.00 | 445 | 12.30 | 1.00 | |
Female | 35,678.7 | 272 | 7.62 | 1.06 | 439 | 12.30 | 1.00 | |
Age group in years | ||||||||
< 5 | 12,739.8 | 122 | 9.58 | 1.37 | 203 | 15.93 | 1.12 | |
5–14 | 23,727.3 | 184 | 7.75 | 1.11 | 275 | 11.59 | 0.81 | |
15–24 | 13,999.7 | 76 | 5.43 | 0.78 | 101 | 7.21 | 0.51 | |
≥ 25 | 21,392.3 | 149 | 6.97 | 1.00 | 305 | 14.26 | 1.00 | |
Educational status of household head | ||||||||
Illiterate | 41,303.9 | 288 | 6.97 | 1.03 | 457 | 11.06 | 0.99 | |
Read and write | 7712.3 | 88 | 11.41 | 1.69 | 128 | 16.60 | 1.49 | |
Primary education | 16,918.3 | 115 | 6.80 | 1.01 | 233 | 13.77 | 1.24 | |
Secondary and above | 5924.7 | 40 | 6.75 | 1.00 | 66 | 11.14 | 1.00 | |
Wealth Status | ||||||||
Poor | 23,837.3 | 171 | 7.17 | 1.05 | 301 | 12.63 | 1.10 | |
Middle | 23,994.1 | 196 | 8.17 | 1.20 | 308 | 12.84 | 1.12 | |
Rich | 24,027.7 | 164 | 6.83 | 1.00 | 275 | 11.45 | 1.00 | |
Family size | ||||||||
≤ 5 | 22,036.5 | 164 | 7.44 | 1.01 | 280 | 12.71 | 1.05 | |
> 5 | 49,822.6 | 367 | 7.37 | 1.00 | 604 | 12.12 | 1.00 | |
Intervention arms | ||||||||
IRR + LLIN | 18,712.6 | 143 | 7.64 | 0.97 | 236 | 12.61 | 1.00 | |
LLIN alone | 17,243.0 | 105 | 6.09 | 0.78 | 209 | 12.12 | 0.96 | |
IRS alone | 17,152.1 | 136 | 7.93 | 1.01 | 222 | 12.94 | 1.03 | |
Routine | 18,751.4 | 147 | 7.84 | 1.00 | 217 | 11.57 | 0.92 | |
House roofing | ||||||||
Thatch/grass | 33,481.5 | 266 | 7.94 | 1.15 | 476 | 14.22 | 1.12 | |
Corrugated iron | 38,377.6 | 265 | 6.91 | 1.00 | 486 | 12.66 | 1.00 | |
Distance from breeding | ||||||||
≤ 1.66 km | 35,330.7 | 337 | 9.54 | 1.80 | 486 | 16.97 | 1.48 | |
> 1.66 km | 36,528.4 | 194 | 5.31 | 1.00 | 398 | 11.50 | 1.00 | |