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Table 2 Plasmodium falciparum parasitaemia stratified by age, sex, socioeconomic status and setting, mean parasitaemia and results from bivariate negative binomial regression models on Plasmodium falciparum parasitaemia

From: Disparities of Plasmodium falciparum infection, malaria-related morbidity and access to malaria prevention and treatment among school-aged children: a national cross-sectional survey in Côte d’Ivoire

Variable Total examined Positive for P. falciparuminfection P. falciparumparasitaemia categories (parasites/μl of blood) Negative binomial regression model for P. falciparumparasitaemia (parasites/μl of blood)
    Geometric mean parasitaemia <50 50-499 500-4,999 5,000-49,999 ≥50,000   
     n (%) n (%) n (%) n (%) n (%) IRR (95% CI) p-value
Age group (years)           
 5-10 3,486 2,397 541.8 1,212 (34.8) 979 (28.1) 1,141 (32.7) 151 (4.3) 3 (0.1) 1.00  
 11-16 1,636 1,142 421.0 564 (34.5) 539 (33.0) 475 (29.0) 58 (3.6) 0 (0.0) 0.78 (0.67, 0.90) 0.001*
Sex           
 Male 2,714 1,942 511.3 875 (32.2) 814 (30.0) 915 (33.7) 109 (4.0) 1 (0.0) 1.00  
  Female 2,408 1,597 485.4 901 (37.4) 704 (29.2) 701 (29.1) 100 (4.2) 2 (0.1) 1 (0.87, 1.14) 0.950
Socioeconomic status           
 1 1,076 855 520.1 268 (24.9) 357 (33.2) 405 (37.6) 45 (4.2) 1 (0.1) 1.00  
 2 1,011 755 466.3 294 (29.1) 342 (33.8) 335 (33.1) 40 (4.0) 0 (0.0) 0.90 (0.73, 1.11) 0.314
 3 946 664 515.2 312 (33.0) 283 (29.9) 313 (33.1) 37 (3.9) 1 (0.1) 0.95 (0.77, 1.18) 0.642
 4 966 595 524.8 402 (41.6) 244 (25.3) 278 (28.8) 42 (4.4) 0 (0.0) 0.81 (0.66, 1.01) 0.061
 5 1,123 670 475.4 500 (44.5) 292 (26.0) 285 (25.4) 45 (4.0) 1 (0.1) 0.89 (0.72, 1.09) 0.265
Setting           
 Rural 3,958 2,870 495.7 1,239 (31.3) 1241 (31.4) 1319 (33.3) 157 (4.0) 2 (0.1) 1.00  
 Urban 1,164 669 515.6 537 (46.1) 277 (23.8) 297 (25.5) 52 (4.5) 1 (0.1) 1.02 (0.87, 1.20) 0.800
  1. *Statistically significant (p <0.05).
  2. IRR: incidence rate ratio.
  3. Socioeconomic status: from less wealthy (1) to wealthiest (5).