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Table 1 Incidence density of clinical malaria* by age group in under five year-old children

From: Epidemiology of malaria in the forest-savanna transitional zone of Ghana

Age group Episodes of clinical malaria Person Years Incidence density (no. of episodes per child per year)
Any Parasitaemia    
0-6 mth 36 5637 2.3
0-11 mth 145 12301 4.3
12-23 mth 310 13239 8.6
24-35 mth 246 10618 8.5
36-47 mth 224 11673 7.0
48-59 mth 133 7658 6.3
under-five yrs 1058 55489 7.0
Parasitaemia >5000/μL    
0-6 mth 12 5637 0.8
0-11 mth 77 12301 2.3
12-23 mth 222 13239 6.1
24-35 mth 166 10618 5.7
36-47 mth 122 11673 3.8
48-59 mth 69 7658 3.3
under-five yrs 656 55489 4.3
Parasitaemia >10000/μL    
0-6 mth 9 5637 0.6
0-11 mth 62 12301 1.8
12-23 mth 193 13239 5.3
24-35 mth 145 10618 5.0
36-47 mth 103 11673 3.2
48-59 mth 56 7658 2.7
under-five yrs 559 55489 3.7
Parasitaemia >20000/μL    
0-6 mth 7 5637 0.5
0-11 mth 45 12301 1.3
12-23 mth 146 13239 4.0
24-35 mth 108 10618 3.7
36-47 mth 80 11673 2.5
48-59 mth 46 7658 2.2
under-five yrs 425 55489 2.8
Parasitaemia >50000/μL    
0-6 mth 1 5637 0.1
0-11 mth 27 12301 0.8
12-23 mth 80 13239 2.2
24-35 mth 61 10618 2.1
36-47 mth 32 11673 1.0
48-59 mth 16 7658 0.8
under-five yrs 216 55489 1.4
  1. * Clinical malaria = parasitemia at defined levels plus either temperature ≥ 37.5°C or reported fever within 48 hours