Breast cancer survival in Great Cuiaba, Brazil: a population-based study

A population-based cohort of 61 women diagnosed with breast cancer in 2008 and 2009, in Great Cuiabá, Mato Grosso, followed by 2018 in the regional mortality database. Specific survival was analyzed through the Kaplan-Meier curve, with adjustment of the Weibull model and Log-Weibull Regression. The survival curves of the variables were compared using the log-rank test which were statistically significance (p<0.05).

Results:

The mean time to death is approximately 51.1 months. Women aged ≤ 50 years and of white race/color presented the worst survival.

Conclusion:

We found out that age, race/color affect specific survival and there is a need for reviewing the control plan for breast cancer in order to increase the survival of women diagnosed with this pathology.

Keywords:
Women’s health; Breast neoplasms; Survival analysis; Information systems

Variable	Absolute frequency (n)	Relative frequency (%)
Age
≤ 50 years old	18	29.51
> 50 years old	43	70.49
Race / color
White	24	39.34
Not white	37	60.66
Marital status
Married	24	39.34
Not married	37	60.66
Education
<8 of schooling	33	54.10
≥ 8 of schooling	28	45.90
Municipality
Cuiabá	47	77.05
Varzea Grande	14	22.95
Half diagnosis
Primary tumor histology	60	98.37
Other	1	1.64
Morphology
Infiltrating ductal carcinoma	46	75.41
Other	15	24.59

Parameter	Estimate	Standard error	P value	CI 95%
σ	0.4509	0.0473	<0,0001	(0.3672; 0.5538)
Intercept	4.4059	0.4884	<0,0001	(3.4486; 5.3632)
Age	0.2883	0.1345	0.0032	(0.0247; 0.5519)
Education	-0.0078	0.0297	0.7928	(-0.0660; 0.0504)
Race / color	-0.2979	0.1248	0.0170	(-0.5424; -0.0533)
Marital status	-0.1116	0.1191	0.3485	(-0.3450; 0.1218)
Means of diagnosis	-0.3968	0.4607	0.3890	(-1.2997; 0.5060)

Parameter	Estimate	Standard error	P value	CI=95%
σ	0.4585	0.0479	< 0.0001	(0.3736; 0.5627)
Intercept	3.9334	0.1365	< 0.0001	(3.6658; 4.2010)
Age	0.3065	0.1361	0.0243	(0.0397; 0.5732)
Race / color	-0.3058	0.1270	0.0161	(-0.5548; -0.0568)

Universidade Federal do Rio Grande do Sul. Escola de Enfermagem Rua São Manoel, 963 -Campus da Saúde , 90.620-110 - Porto Alegre - RS - Brasil, Fone: (55 51) 3308-5242 / Fax: (55 51) 3308-5436 - Porto Alegre - RS - Brazil
E-mail: revista@enf.ufrgs.br

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[1] Corresponding author:
Jânia Cristiane de Souza Oliveira E-mail: jania@ufr.edu.br