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Table 1 Characteristics of malaria parasitaemia positive and negative children in a 1 year longitudinal cohort study

From: Malaria, helminths, co-infection and anaemia in a cohort of children from Mutengene, south western Cameroon

Parameter Subclass Malaria parasitaemia Status  % (n) p value
Enrolment a 6 months b 12 monthsc
Pos Neg Pos Neg Pos Neg
Age group (years) <5 31.3 (21) 58.4 (178) 42.6 (23) 47.8 (108) 27.8 (10) 52.1 (138) 0.001a,*
0.492b
0.031c,*
5–10 68.7 (46) 41.6 (127) 57.4 (31) 52.2 (118) 72.2 (26) 47.9 (127)
% (n) 18 (67) 82 (305) 19.3 (54) 80.7(226) 12 (36) 88 (265)
Gender Male 47.8 (32) 53.6 (164) 53.7 (29) 50.4 (114) 52.8 (19) 52.5 (139) 0.360a
0.625b
0.971c
Female 52.2 (35) 46.4 (142) 46.3 (25) 49.6 (112) 47.2 (17) 47.5 (126)
n 67 306 54 226 36 265
Anaemia status Anaemic 73.1 (49) 71.1 (216) 79.2 (42) 55.7 (122) 69.4 (25) 40 (106) 0.733a
0.002b,*
0.001c,*
Non anaemic 26.9 (18) 28.9 (88) 20.8 (11) 44.3 (97) 30.6 (11) 60 (159)
n 67 304 53 219 36 265
Febrile Yes 25.4 (17) 20 (61) 16.7 (9) 8.4 (19) 8.3 (3) 0 (0) 0.328a
0.069b
0.001c,*
No 74.6 (50) 80 (244) 83.3 (45) 91.6 (207) 91.7 (33) 100 (265)
n 67 305 54 226 36 265
Helminth status Positive 18 (11) 20.2 (52) 3.7 (1) 11.8 (13) 0.698a
0.212b
Negative 82 (50) 79.8 (205) 96.3 (26) 88.2 (97)
n 61 257 27 110
  P+ M+ (%) P+ M− (%) P− M− (%)  
  Classification of participants (Mean ± SEM)
 Age (years) 5.18 ± 0.38 (2.9) 5.55 ± 0.20 (12.8) 4.65 ± 0.08 (84.3) <0.001§
 Haemoglobin (g/dl) 9.08 ± 0.34 (3.0) 9.93 ± 0.13 (12.9) 10.62 ± 0.05 (84.1) <0.001§
 Mp density (/µl) 3.32 ± 0.16 (18.5) 2.91 ± 0.07 (81.5) 0.012§
  1. *Statistical significance determined by Chi square analysis
  2. §Statistical significance determined using the one-way analysis of variance
  3. aDifferences at enrolment; bdifferences at 6 months; cdifferences at 12 months
  4. P− M− mp negative and no clinical manifestation of malaria, P+ M− mp positive and no clinical manifestation of malaria, P+ M+ malaria cases (febrile, mp positive+ at least one sign of malaria)