Drop in early-stage colorectal cancer diagnoses after COVID-19: Preliminary report from the COVID-DELAY study

ABSTRACT

Background: By the end of 2020, coronavirus disease 2019 (COVID-19) would have indelibly marked the cancer care setting. With Italy at the forefront of pandemic, unprecedented measures were adopted to tackle the quality care issue. As a result of pausing screening programs, diagnostic delays might affect the years to come. Aim of our multicenter Italian study is to evaluate whether the COVID-19 outbreak has impacted on likelihood of receiving timely diagnosis, staging and treatment for colorectal cancer (CRC) patients (pts) after March 2020 compared to pre-pandemic time. Methods: Medical records of all consecutive newly diagnosed CRC pts referred to 4 Italian Oncology Departments between March and December 2020 were examined. Access rate (number of pts/days) and temporal intervals between date of symptoms onset, radiological and cytohistological diagnosis, treatment start and first radiological evaluation were analyzed and compared with the same months of 2019. Differences between the two years were evaluated using Fisher’s exact test or chi-square test for categorical variables and unpaired Student t test, or the Mann-Whitney U test for continuous variables. Results: A reduction (20%) in newly diagnosed CRC cases was seen when compared with 2019 (214 vs 268). The decline was greater in the lockdown period compared to the other months (percentage drop 40 % vs 12%). Newly CRC pts in 2020 were less likely to be diagnosed with early stage (stage I-II-III) CRC (67% vs 72%). Other clinical and tumor characteristics were similar regardless of the year. Looking at pts management, no differences emerged in terms of interval between symptom onset and radiological diagnosis (median 19 days in 2020 vs 28 days in 2019, p = 0.88), symptom onset and cytohistological diagnosis (25 vs 36 days, p = 0.27), symptom onset and treatment start (median 86 vs 100 days, p = 0.79). However, less CRC were discussed in multidisciplinary tumor meetings during the 2020 (45% vs 54%, p = 0.07). Conclusions: While COVID-19 repercussions will be likely felt for decades to come, our data suggest an alarming drop in early-stage CRC diagnoses during the first pandemic year. Conversely, our study draws the attention on the efforts made to ensure diagnostic-therapeutic pathways proper operation. Legal entity responsible for the study The authors. Funding: Has not received any funding. Disclosure All authors have declared no conflicts of interest.