Knowledge of a cancer diagnosis is a protective factor for the survival of patients with breast cancer: a retrospective cohort study

Table 3 Relationship between cancer awareness and survival time of breast cancer patients by stratified analysis

Stratified factors	3-year survival rate		5-year survival rate		P^*
Stratified factors	Did know cancer diagnosis	Did not know cancer diagnosis	Did know cancer diagnosis	Did not know cancer diagnosis	P^*
Sex
Male	0.85	0.66	0.76	0.58	0.103
Female	0.89	0.79	0.85	0.73	< 0.001
Age (years)
< 45	0.92	0.87	0.88	0.82	< 0.001
45-	0.91	0.86	0.87	0.82	< 0.001
55-	0.91	0.85	0.87	0.81	< 0.001
65-	0.89	0.79	0.82	0.73	< 0.001
≥ 75	0.70	0.56	0.60	0.45	< 0.001
Clinical stage ^a
Stage 0- I	0.97	0.95	0.96	0.91	< 0.001
Stage II	0.93	0.89	0.89	0.85	0.001
Stage Ш	0.79	0.76	0.71	0.69	0.265
Stage IV	0.47	0.40	0.34	0.31	0.005
Unclassified	0.84	0.70	0.79	0.63	< 0.001
Surgery history
Yes	0.92	0.87	0.88	0.82	< 0.001
No	0.85	0.70	0.81	0.63	< 0.001
Diagnostic year ^b
1: before 2006	0.85	0.73	0.80	0.67	< 0.001
2: 2007–2011	0.90	0.80	0.86	0.75	< 0.001
3: 2012–2016	0.93	0.84	0.92	0.81	< 0.001
Hospital grade
Primary grade hospital	0.60	0.36	0.52	0.36	0.034
Middle grade hospital	0.89	0.78	0.86	0.71	< 0.001
High grade hospital	0.89	0.81	0.85	0.75	< 0.001

^* overall comparison of survival curves in subgroups
^a patients with unclear knowing status of cancer diagnosis were not included
^b Diagnostic year 1 means those being diagnosed before 2006, 2 means those being diagnosed from 2007 to 2011, 3 mean those being diagnosed from 2012 to 2016

ISSN: 1471-2407