IJCS | Volume 32, Nº6, November / December 2019

609 Table 1 - Prevalence and comparison of sociodemographic characteristics and presence of comorbidities between pre- and post-accreditation periods in a reference cardiology service. Salvador-Bahia, 2018 Variable General* (n = 372) Pre-accreditation* (n = 186) Post-accreditation* (n = 186) p value STEACS (%) 117 (31.5) 47 (25.3) 70 (37.6) 0.01 Male (%) 211 (56.7) 111 (59.7) 100 (53.8) 0.250 Health insurance (%) 262 (70.4) 134 (72) 128 (68.8) 0.495 SAH (%) 299 (80.4) 152 (81.7) 147 (79) 0.514 Diabetes mellitus (%) 159 (42.7) 78 (41.9) 81 (43.5) 0.753 Previous AMI (%) 110 (29.6) 46 (24.7) 64 (34.4) 0.041 Previous coronary artery bypass grafting surgery (%) 36 (9.7) 19 (10.2) 17 (9.1) 0.726 Dyslipidemia (%) 187 (50.3) 108 (58.1) 79 (42.5) 0.003 Previous stable angina (%) 78 (21) 39 (21) 39 (21) 1.000 Previous heart failure (%) 30 (8.1) 16 (8.6) 14 (7.5) 0.703 Previous angioplasty (%) 82 (22) 40 (21.5) 42 (22.6) 0.802 (*) Absolute frequencies; Absolute numbers and percentages on the total sample. Chi-square test; STEACS: ST-segment elevation acute coronary syndrome; SAH: systemic arterial hypertension; AMI: acute myocardial infarction. Leite et al. Accreditation in outcomes of patients with ACS Int J Cardiovasc Sci. 2019;32(6):607-614 Original Article context of acute coronary syndrome (age, sex, type of ACS, systemic arterial hypertension, diabetes mellitus, dyslipidemia, previous infarction and prior coronary artery bypass grafting surgery). The differences observed in all statistical tests (non- parametric and linear regression) were considered significant when the probability (p) of type I error was < 0.05. Results A total of 372 patients were included in the study, of which 186 in period 1 (pre-accreditation) and 186 in period 2 (post-accreditation). Of the total, 117 (31.5%) were patients diagnosed with ACS with ST-segment elevation and 255 (68.5%) were diagnosed as non-ST- segment elevation ACS. In period 1, 47 (25.3%) patients with ST-segment elevation and 139 (74.7%) with non-ST-segment elevation were admitted and, in period 2, 70 (37.6%) patients with ST-segment elevation and 116 (62.4%) patients with non- ST-segment elevation were admitted. Male sex was the most prevalent one, with 211 (56.7%) patients; 110 (29.6%) were from the public health system —SUS; and, as for themedical history, themost prevalent comorbidities were systemic arterial hypertension — SAH, totaling 299 (80.4%) patients, and dyslipidemia, with 187 (50.3%) patients. (Table 1) The average age was 65.9 (± 12,2), with minimum age of 14 and maximum of 95. Regarding the length of hospital stay, in the total period of the study, the median CCU length of stay was 3 (IQR = 2 - 4) and the hospital length of stay was 7 days (IQR = 5 - 11.75). In period 1, the median was 3 days (IQR = 2 - 4) for the CCU length of stay and 8 days for the hospital length of stay (IQR = 5 - 12.25). In period 2, the median was 2.5 days for the CCU length of stay (IQR = 2 - 4) and 6 days for hospital length of stay (IQR = 4 - 11). By analyzing the median variation between the CCU length of stay and the hospital length of stay between the pre- and post-accreditation periods, it was found that the reduced hospital length of stay in the general sample was statistically significant at p = 0.004. (Table 2) In the analysis of subgroups, the median remained with a tendency of reduction, but only the decrease in hospital length of stay of non-STEMI was relevant, with p = 0.001. (Table 2)