Association of socioeconomic status with other potential prognostic variables among persons diagnosed with hepatocellular carcinoma, 1990–2009.

Income quintile 1, lowest socioeconomic status; Income quintile 5, highest socioeconomic status.“-“, counts less than five have been suppressed. *p-values were calculated using chi-squared tests, testing for homogeneity across all income groups, excluding the missing groups. †Patients were not considered as being screened if they had only one ultrasound in the three months prior to diagnosis or if they were receiving HCC care prior to the ultrasound. ‡Included multiple treatments for some people. HCC, hepatocellular carcinoma.收入五分位组1对应最低社会经济地位，收入五分位组5对应最高社会经济地位。表中符号"-"代表样本量小于5的计数已予以隐匿处理。 * 显著性p值通过卡方检验计算所得，用于检验除缺失组外的所有收入组间的同质性。 † 若患者仅在确诊前3个月内接受过1次超声检查，或在该超声检查前已接受肝细胞癌（hepatocellular carcinoma，简称HCC）诊疗，则不计入筛查人群。 ‡ 部分受试者纳入了多次治疗记录。 HCC：肝细胞癌（hepatocellular carcinoma）