Table 1.

Characteristics of C/T and T/T genotyped patients with positive LBHT and suspected lactose intolerance.

Patient age, yearsSexGenotypeΔH2, ppmSymptoms at lactose challenge during LBHTLactose-free dietPrimary diagnosisSymptoms at genotyping
43MCT21NoneResponseNE1No complaints under diet
54MCT22NoneNo responsePancreas insufficiencyDiarrhea
74MCT22NoneNo responseNENone
83FCT29DiarrheaNo responsePancreas insufficiencyNone
27FCT30NoneNo responseCrohn diseaseDiarrhea
60FCT39BloatingNo responseNEBloating
48FCT44Abdominal painNo responseGastric bypassAbdominal pain; diarrhea
56FCT44Abdominal pain; bloating; diarrheaNo responseNEDiarrhea
71MCT45Abdominal pain; bloating; diarrheaResponseNENo complaints under diet
71MCT47NoneNo responseEosinophilic duodenitisAbdominal pain; diarrhea
26FCT62Abdominal pain; diarrheaNDCeliac sprueNo complaints with gluten-free diet
82MCT66NoneNo responseNEAbdominal pain; diarrhea
66FCT72Abdominal pain; nauseaNo responseNENone
81FCT133Abdominal pain; diarrheaNo responseNEAbdominal pain; diarrhea
61FCT162Abdominal pain; diarrheaNo responseNENone
60MCT200Abdominal pain; diarrheaNo responsePancreas insufficiencyDiarrhea
24FTT22NoneNo responseNENone
40MTT22NoneNo responsePancreas insufficiencyDiarrhea
85MTT22NoneNo responseNENone
74FTT23NoneNo responseNENone
65FTT28NoneNDCeliac sprueNo complaints with gluten-free diet
76FTT30Abdominal pain; bloating; diarrheaNo responseSoybean allergyDiarrhea
30FTT41NoneNo responseNENone
18MTT43Abdominal pain; bloatingNo responseNEAbdominal pain; bloating
83FTT49NoneNo responseNEDiarrhea
81FTT64Bloating; diarrheaNo responseNEBloating; diarrhea
82FTT137Bloating; diarrheaNo responseNEDiarrhea
  • 1 NE, primary diagnosis not established at time of LBHT; ND, no lactose-free diet.