Cox method measured hazard ratio and 99.9% confidence interval of cancer associated with appendectomy by cancer site and age.

<p>* p < 0.0001</p><p>Cox method measured hazard ratio and 99.9% confidence interval of cancer associated with appendectomy by cancer site and age.</p

Cox method measured hazard ratio and 99.9% confidence interval of cancer associated with appendectomy by cancer site and gender.

<p>* p < 0.0001</p><p>Cox method measured hazard ratio and 99.9% confidence interval of cancer associated with appendectomy by cancer site and gender.</p

Incidence of cancer in study cohorts and Cox methods measured hazard ratios and 99.9% confidence interval of cancer associated with appendectomy in by cancer site.

<p>Incidence of cancer in study cohorts and Cox methods measured hazard ratios and 99.9% confidence interval of cancer associated with appendectomy in by cancer site.</p

Cox method measured hazard ratios and 99.9% confidence interval of cancer associated with appendectomy by cancer site and follow-up months.

<p>* p < 0.0001</p><p>Cox method measured hazard ratios and 99.9% confidence interval of cancer associated with appendectomy by cancer site and follow-up months.</p

Distribution in demographics and comorbidities compared between two cohorts.

<p>SD, standard deviation.</p><p>Distribution in demographics and comorbidities compared between two cohorts.</p

Flow chart for study subjects.

<p>Flow chart for study subjects.</p

Flow chart for the study subjects.

<p>Flow chart for the study subjects.</p

Incidence and hazard ratios of colorectal cancer by age and gender.

<p>Incidence and hazard ratios of colorectal cancer by age and gender.</p

Incidence and hazard ratio of colorectal cancer in different types of appendectomy.

<p>Incidence and hazard ratio of colorectal cancer in different types of appendectomy.</p

Incidence of colorectal cancer by site and hazard ratio of the site-specific appendectomy cohort to the comparison cohort.

<p>Incidence of colorectal cancer by site and hazard ratio of the site-specific appendectomy cohort to the comparison cohort.</p