“…In one study, in which different groups of persons with cancer were surveyed using the same instrument, highly significant differences in utilization of the Internet by diagnosis were observed: 16% of lung patients, 18% of head-and-neck patients, 27% of prostate patients, 34% of breast patients, and 45% of gynecologic patients reported using the Internet to obtain cancer-related information. 20 This partly reflects demographic differences between the cancer types: We know from many studies that women are more active health seekers than men, 28,29 and that younger age 7,9,10,12,14,16,20,21,24 is also associated with greater Internet use. Therefore, age and sex are confounders when comparing Internet use, and it is unclear whether differences between diagnostic groups are mainly a result of demographic differences or whether they remain significant when adjusted for patient age and sex.…”