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. 2013 Apr 3;2013:174782. doi: 10.1155/2013/174782

Table 1.

Patient-related factors influencing clinical assessment of endothelial function in children.

Influencing factor Solution
Time of day Perform measurements between 8 and 12 am to rule out an effect of diurnal variation of endothelial function
Food Perform measurement after an overnight fast
Medication Ask patients to take their medication after the test
(Mild) infection Postpone the test for >2 weeks
Active and passive smoking Exclude smokers and/or record (parental) smoking habits
Gender Check whether all groups are matched for sex
Age Check whether all groups are matched for age and pubertal stage
Menstrual cycle Girls in same phase of cycle or note the menstrual phase
Skin temperature Allow sufficient patient acclimatization time; cover patients using a blanket
Mental stress Avoid anxiety by providing patient information; perform the test in a quiet room