<div>Abbreviations: SMR, standardized mortality ratio; CI, confidence
intervals.</div><div><sup>a</sup> International Classification of Diseases, Eighth
Revision codes (ICD-8): 950-959; International Classification of
Diseases, Ninth Revision codes (ICD-9): 950-959; and International
Statistical Classification of Diseases and Related Health Problems,
Tenth Revision (ICD-10) codes U03, X60-X84, and Y87.0 and recode 50220.</div><div><sup>b</sup> ICD-8: 800-949; ICD-9: 800-949; and ICD-10: V01-X59
and Y85-Y86 and recode 50210.</div><div><sup>c</sup> Per 100,000 person-years.</div><div><sup>d</sup> In brief, SMRs were estimated as the ratios of
observed to expected number of deaths. The observed number of deaths
represents the total number of deaths from suicide or accidental injury
among patients with primary ovary cancer. To obtain the expected number
of deaths, we derived the stratum-specific mortality rates of suicide or
accidental injury of the general US population and calculated the
person-years of relevant strata in the cancer group. The
stratum-specific expected number of deaths was estimated as the product
of mortality rate in the cancer-free control and the person-years in the
cancer group. The total expected number of deaths was a summation of all
the expected number of deaths across the strata.</div><div><sup>e</sup> Income (median family income) and educational level
(percentage of residents &gt;25 years of age with at least a
bachelor’s degree) were categorized into quartiles.</div><div><sup>f</sup> The variable of low grade included “Well
differentiated; Grade I” and “Moderately differentiated; Grade II”,
and the variable of high grade included “Poorly differentiated; Grade
III” and “Undifferentiated; anaplastic; Grade IV”.</div><div>Table 2. The risk of suicide and accidental death among patients with
ovarian cancer by histological subgroup.</div>