Characteristics of mothers and fathers of infants with beriberi and febrile and afebrile controls.

Superscript numbers refer to sample size if data missing.amedian (range),bmean (95%CI),cof those with siblings,dfor reference ranges see table base,ematched comparison of both control groups combined, with cases, except f matched comparison of the groups separately, the first P value refers to cases versus febrile controls and the second P value to cases versus afebrile controls,gp-value could not be obtained in the matched analysis as the mothers of cases were all breast fed,hp-value could not be obtained in the matched analysis as the results for all controls were zero,i‘Lao Loum’ or ‘lowland Lao’ or ‘Tai-Kadai ethno-linguistic family’ see Ref [54].d Basal erythrocyte transketolase activity (unpublished data NDNS Young people and Adult surveys, UK)For females aged/years micromoles/min/gHb4–18 ≤0.5719–24 ≤0.5725–34 ≤0.5035–49 ≤0.47The first line in each row refers to all patients with data and the second line to only those with infant basal ETK data.