Cox proportional hazard regression model of Overall Survival.

Table 3.a Adjusted by Cox proportional hazards models including all factors, as categorized in b Including American Indian/AK Native, Asian/Pacific Islander.c Including divorced, widowed, single (never married),separated.% of individuals having over a 12th grade education level; Low indicates a county with less than 78.0% (including 78.0%) of individuals having over a 12th grade education level. (78.0% is the median of all county education data studied).d High indicates a county with greater than 78.0e Grade are coded as followings: Well differentiated; Grade I; Moderately differentiated; Grade II; Poorly differentiated; Grade III; Unknown.f ER: Estrogen Receptor; PR: Progesterone Receptor.

表3.a 经纳入全部协变量的Cox比例风险模型校正。
b 研究人群涵盖美洲印第安人/阿拉斯加原住民、亚裔/太平洋岛民。
c 研究人群涵盖离异、丧偶、未婚（从未婚）、分居人群。
受教育程度高于12年级的人群占比：低分组指县域内该人群占比≤78.0%（含78.0%），78.0%为本次研究中所有县域教育数据的中位数。
d 高分组指县域内受教育程度高于12年级的人群占比＞78.0%。
e 肿瘤分级编码规则如下：高分化；Ⅰ级；中分化；Ⅱ级；低分化；Ⅲ级；未知。
f ER（Estrogen Receptor，雌激素受体）；PR（Progesterone Receptor，孕激素受体）。