IJCS | Volume 31, Nº4, July / August 2018

417 Guerra et al. Screening: depression in heart failure Int J Cardiovasc Sci. 2018;31(4)414-421 Original Article Ethical procedures The study was approved by the Research Ethics Committee of Hospital Universitário Antônio Pedro / Universidade Federal Fluminense with the number 630.078. The patients were informed about the objectives of the research, signed a free and informed consent form, and were assured about their right to data confidentiality and care in regards to the use of their information in written work. The patients presenting symptoms related to any mental disorder during the clinical interview of the main study were referred to a mental health service integrated into the clinic specialized in HF. Results A total of 76 patients participated in this study, of whom 40 (52.6%) were female and 36 (47.4%) were male. The binomial test showed no significant difference between these proportions (p = 0.731), i.e., the sample was balanced in relation to the distribution of men and women, and the observed prevalence of women was not significant. The age of the patients followed a normal distribution (p = 0.094 by the KS test and p = 0.467 by the SW test), with an interval of 35 to 91 years, a mean of 63.0 years, standard deviation of 11.6 years, and a median of 65 years. The CV of age (0.18) showed that the distribution of age had low variability in the sample. The monthly income of the patients did not follow a normal distribution (p = 0.000) and ranged from R$ 500.00 to 3,000,00, with a mean of R$ 1,118.74 (standard deviation R$ 576.32 and median R$ 1,000.00). The CV of the income (0.51) showed that the distribution of income had high variability in the sample. The frequency distribution of the observed variables characterizing the patients are shown in Table 1. Typically, all patients had a white self-declared color (67.1%), education level of Elementary School I (56.6%), NYHA functional class II (51.3%), hypertension (100%), dyslipidemia (81.6%), diabetes (56.4%), and obesity (44.8%). There was no significant difference between the age of men and women (p = 0.056) or between the incomes of men and women (p = 0.644). The male and female groups did not differ in relation to the distribution of self-declared color (p = 0.641), education level (p = 0.352), and incidence of diabetes (p = 0.223), dyslipidemia (p = 0.827), chronic renal failure (CRF; p = 0.426), chronic obstructive pulmonary disease (COPD; p = 0.601), and stroke (p = 1.000). Table 1 - Sociodemographic and clinical characteristics of outpatients with heart failure Sociodemographic variables n (76) Gender Female 52.6% (n = 40) Male 47.4% (n = 36) Age (mean ± SD) 63.03 ± 13.5 years Self-declared color White 67.1% (n = 51) Black 28.9% (n = 22) Indeterminate 3.9% (n = 3) Education level* Literacy 2.6% (n = 2) Elementary School I 56.6% (n = 43) Elementary School II 36.8% (n = 28) Middle School 3.9% (n = 3) Family income in reais (mean ± SD) 1,118.74 ± 576.32 Functional class (NYHA) I 30.3% (n = 23) II 51.3% (n = 39) III 18.4% (n = 14) Hypertension 100% (n = 76) Dyslipidemia 81.6% (n = 62) Diabetes 56.6% (n = 43) BMI (kg/m 2 ) Low weight 1.3% (n = 1) Normal weight 23.7% (n = 18) Overweight 14.5% (n = 11) Pre-obesity 15.8% (n = 12) Obesity I 30.3% (n = 23) Obesity II 9.2% (n = 7) Obesity III 5.3% (n = 4) Anemia 19.7% (n = 15) CRF 23.7% (n = 18) COPD 3.9% (n = 3) Stroke 5.3% (n = 4) n: number of patients; SD: standard deviation; NYHA: New York Heart Association; BMI: body mass index; CRF: chronic renal failure; COPD: chronic obstructive pulmonary disease.