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Table 1 Socio-demographic features of patients in the study population

From: Exploring association between MBL2 gene polymorphisms and the occurrence of clinical blackwater fever through a case–control study in Congolese children

 Case (n = 43)Control (n = 86)Total (n = 129)OR (IC 95%)p
Distribution for age
 ≤ 5 years8 (18.6)20 (23.3)28 (21.7)1 
 > 5 years35 (81.4)66 (76.7)101 (78.3)1.33 (0.53–3.32)0.676
Sex (%)
 Male21 (48.8)40 (46.7)61 (47.3)1.10 (0.53–2.28)0.803
 Female22 (51.2)46 (53.5)68 (52.7)1 
Season
 Rainy38 (88.4)51 (59.3)89 (69.0)5.22 (1.87–14.56)< 0.001
 Dry5 (11.6)35 (40.7)40 (31.0)1 
Plasmodium
 Falciparum37 (86.0)73 (84.9)110 (85.3)1.10 (0.39–3.12)0.860
 Falciparummalariae6 (14.0)13 (15.1)19 (14.7)1 
Parasitaemia (parasites/µl)
 Low (< 1000 tropho/µl)33 (76.7)43 (51.8)76 (61.3)3.31 (1.41–7.78)0.005
 High (≥ 1000 tropho/µl)10 (23.2)40 (48.2)48 (38.7)1