Tumor Growth and Percentage Change in Tumor Size Between Observation and Treatment Groups 
Tumors, mucinous peritoneal disease, mucinous disease
TUMORS, CAVITY
Measured using modified peritoneal Response Evaluation Criteria in Solid Tumors, a novel quantitative measuring system designed for mucinous peritoneal disease, which measures up to 5 areas of mucinous disease in the abdominal cavity. Numbers indicate patient IDs.Median (range) OS for the entire cohort was 53.2 (8.1 to 95.5) months, and there was no significant difference in OS between the observation-first group (76.0 [8.6 to 95.5] months) and the treatment-first group (53.2 [8.1 to 64.1] months; hazard ratio [HR], 0.64; 95% CI, 0.16 to 2.6; 