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[null,null,"Additional file 1"]
[]
[{"$nulls":5},"Haematocrit (PCV)",null,null,"Severe anaemia (SA)",{"$nulls":4},"Moderate anaemia (MA)"]
[null,null,"Variable","Class","n","Mean","p(‡)",null,"%SA","(95%IC)","OR","p(‡)",null,"%MA",null,"(95%IC)","OR","p(‡)"]
[null,null,"Season","Dry 2001",709,34.4,"-",null,9.7,"(7.7-12.1)","-","-",null,43.3,null,"(39.7-47.0)","-","-"]
[{"$nulls":3},"Rainy 2001",702,32.3,"< 0.001 **",null,17.8,"(15.2-20.8)",1.7,"< 0.001 **",null,61.3,null,"(57.6-64.8)",2.1,"< 0.001 **"]
[{"$nulls":3},"Dry 2002",728,33.3,"< 0.001 **",null,10.2,"(8.2-12.6)",1,0.853,null,51.9,null,"(48.3-55.5)",1.4,"< 0.002 *"]
[null,null,"Age group ","1-3 years",319,30.7,"-",null,33.2,"(28.3-38.6)","-","-",null,78.1,null,"(73.2-82.2)","-","-"]
[{"$nulls":3},"4-6 years",661,32.6,"< 0.001 **",null,14.1,"(11.6-16.9)",0.3,"< 0.001 **",null,63.2,null,"(59.5-66.8)",0.5,"< 0.001 **"]
[{"$nulls":3},"7-9 years",578,34,"< 0.001 **",null,7.8,"(5.9-10.3)",0.2,"< 0.001 **",null,45.8,null,"(41.8-49.9)",0.2,"< 0.001 **"]
[{"$nulls":3},"10-12 y.",457,35,"< 0.001 **",null,3.3,"(2.0-5.3)",0.1,"< 0.001 **",null,30.8,null,"(26.8-35.2)",0.1,"< 0.001 **"]
[null,null,"Spleen score",0,1596,33.7,"-",null,10.9,"(9.5-12.5)","-","-",null,46.9,null,"(44.5-49.4)","-","-"]
[{"$nulls":3},1,205,32.8,"< 0.001 **",null,13.6,"(9.6-19.0)",1.3,0.289,null,59.5,null,"(52.7-66.0)",1.7,"< 0.001 **"]
[{"$nulls":3},2,314,31.8,"< 0.001 **",null,18.5,"(14.6-23.1)",1.9,"< 0.001 **",null,71.3,null,"(66.1-76.1)",2.8,"< 0.001 **"]
[{"$nulls":3},3,24,31.1,"< 0.001 **",null,33.3,"(18.0-53.3)",4.1,"< 0.001 **",null,83.3,null,"(64.1-93.3)",5.6,"< 0.001 **"]
[null,null,"Parasite density",0,898,33.6,"- ",null,10.7,"(8.8-12.9)","-","-",null,47.8,null,"(44.5-51.0)","-","-"]
[{"$nulls":3},">1 p.",276,33.8,0.781,null,7.6,"(5.0-11.4)",0.7,0.168,null,48.9,null,"(43.1-54.8)",1,0.793]
[{"$nulls":3},">200 p.",565,33.3,0.061,null,12,"(9.6-15.0)",0.4,0.478,null,53.5,null,"(49.3-57.5)",1.3,"< 0.05 *"]
[{"$nulls":3},">2’000 p. ",345,32.5,"< 0.001 **",null,20,"(16.1-24.5)",2.1,"< 0.001 **",null,60.3,null,"(55.0-65.3)",1.6,"< 0.001 **"]
[{"$nulls":3},">20’000 p.",55,31.2,"< 0.001 **",null,25.5,"(15.8-38.3)",2.8,"< 0.002 *",null,74.5,null,"(61.7-84.2)",3.2,"< 0.001 **"]

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