Ultrasonography screening intervals of less than 6-12 months were associated with early detection of hepatocellular carcinoma, as well as increased life expectancy and quality of life, according to data from a nationwide comparative effectiveness study of nearly 60,000 patients in Taiwan.
Many international societies, including the American Association for the Study of Liver Diseases, the Asian Pacific Association for the Study of the Liver, and the European Association for the Study of the Liver, recommend abdominal ultrasonography screening for hepatocellular carcinoma (HCC) with or without alpha-fetoprotein every 6 months for patients at increased risk for HCC, wrote Shih-Chiang Kuo, MD, of National Cheng Kung University, Tainan, Taiwan, and colleagues.
However, some studies do not support this recommendation, and data suggest that “adherence to regular screenings by high-risk patients has been inadequate, leading to reduced overall benefits of ultrasonography screening in real-world practice,” and the impact of screening schedules on quality of life has not been assessed, they said.
In a study published in JAMA Network Open, the researchers identified adults with newly diagnosed HCC from 2002 through 2015 using data from the Taiwan National Cancer Registry. Barcelona Clinic Liver Cancer (BCLC) staging information was available for 42,081 men and 17,113 women; the average age was 62 years for men and 69 years for women. The patients were divided into five cohorts based on the time between their last ultrasonography screening and an index date of 90 days before their HCC diagnosis. These groups were 6 months (0-6 months), 12 months (7-12 months), 24 months (13-24 months), 36 months (25-36 months), and longer than 36 months.
“For both sexes, the proportions of patients with HCC classified as being in earlier stages (stage 0 and A) were higher in subcohorts with shorter screening intervals since the most recent ultrasonography,” the researchers wrote.
The researchers also assessed quality of life measures using the European Quality of Life Five-Dimensions in 807 men (3,370 repeated assessments) and 252 women (1,044 repeated assessments). Among men, the loss of quality of life expectancy in terms of quality of life years (QALYs) was 10.0, 11.1, 12.1, 13.1, and 14.6 for screening intervals of 6 months, 12 months, 24 months, 36 months, and beyond 36 months, respectively. The corresponding QALYs for women at the same screening intervals were 9.0, 9.7, 10.3, 10.7, and 11.4, respectively.
In a subgroup analysis according to underlying liver disease, patients with underlying hepatitis B virus infection or cirrhosis showed the greatest benefits from shorter screening intervals. For those with hepatitis B virus infection, abdominal ultrasonography screening 6 months or less prior to diagnosis of HCC was associated with an additional 4.8 QALYs for men and 2.8 QALYs for women, compared with screening longer than 36 months prior to diagnosis. The corresponding savings in QALY for men and women with underlying cirrhosis was 4.8 QALYs and 2.4 QALYs. Patients with no underlying liver disease also benefited from shorter intervals, with potential savings of 3.2 QALYs for men and 1.6 QALYs for women in the 6-month screening groups, compared with the longer than 36 months groups.
However, less than half of the men overall underwent screening withing 6 months or 12 months before diagnosis (31.4% and 39.3%, respectively); for women, 42.2% received screening within 6 months of diagnosis and 51.9% received screening within 12 months.
The study findings were limited by several factors including the use of only the last screening before diagnosis, which allows the possibility that patients in the 6- or 12-month groups did not have regular screening, the researchers noted. In addition, the lack of data on quality of life for women with BCLC stage D might have caused an underestimation of quality of life loss, they said. However, the results were strengthened by the use of a national database and long follow-up period, they said.
The results support intervals of 6-12 months or less for regular ultrasonography screening as a way to improve early detection of HCC, “and may save lives and improve utility for patients with HCC from a lifetime perspective,” the researchers emphasized. “Because people with underlying risk factors (including hepatitis B virus or hepatitis C virus infection, cirrhosis, and alcoholic liver disease) showed only slightly more frequent ultrasonography screening than those without underlying risk factors, we recommend improving this clinical practice,” they concluded.
Impact of identifying risk
“This study is important because HCC remains the third leading cause of cancer deaths, and the 5-year survival rate is low,” said Atsushi Sakuraba, MD, of the University of Chicago, in an interview.
Dr. Sakuraba said that he was not surprised by any of the study findings. “Earlier diagnosis of cancer is often associated with improved outcome in many cancers,” he noted.
However, “Overutilization of resources may lead to increased health care costs, so correct identification of high-risk populations is needed,” Dr. Sakuraba said.
Additional research is warranted in several areas in order to make an impact on clinical practice, Dr. Sakuraba said, notably, “confirmation in other countries and ethnicities where the incidence of viral hepatitis varies.” Comparison to other tests, such as tumor markers, CT, and MRI, is needed as well, he concluded.
The study was supported by the Taiwan Ministry of Science and Technology. The researchers had no financial conflicts to disclose. Dr. Sakuraba had no financial conflicts to disclose.