Table 1.
Demographics and descriptive data comparisons for the “no SMC” and SMC groups.
| No SMC group | SMC group | ||
|---|---|---|---|
| Age (years) | N (total) | 377 | 231 |
| Mean ± SD | 55.2 ± 14.4 | 54.9 ± 13.3 | |
| Min; max | 18.7; 86.9 | 18.4; 87.4 | |
| p = 0.793a | |||
| Sex - n (%) | N (total) | 377 | 231 |
| Females | 141 (37.4%) | 146 (63.2%) | |
| Males | 236 (62.6%) | 85 (36.8%) | |
| χ2 = 38.266, p < 0.001*b | |||
| Self-reported race/ethnicity - n (%) | N (total) | 376 | 230 |
| Black | 47 (12.5%) | 41 (17.8%) | |
| Mixed | 144 (38.3%) | 74 (32.2%) | |
| White | 170 (45.1%) | 108 (47%) | |
| Asian | 5 (1.3%) | 3 (1.3%) | |
| Indigenous | 4 (1.1%) | 1 (0.4%) | |
| Does not know/prefers not to answer | 6 (1.6%) | 3 (1.3%) | |
| χ2 = 5.137, p = 0.399b | |||
| Educational level - n (%)c | N (total) | 376 | 230 |
| No formal education | 17 (4.5%) | 11 (4.8%) | |
| Incomplete primary/elementary education | 111 (29.5%) | 71 (30.9%) | |
| Complete primary/elementary education | 38 (10.1%) | 30 (13%) | |
| Incomplete secondary education | 26 (6.9%) | 16 (7%) | |
| Complete secondary education | 110 (29.3%) | 59 (25.7%) | |
| Incomplete higher/university education | 18 (4.8%) | 16 (7%) | |
| Complete higher/university education | 36 (9.6%) | 21 (9.1%) | |
| Postgraduate education | 20 (5.3%) | 6 (2.6%) | |
| χ2 = 5.54, p = 0.594b | |||
| Socioeconomic status - n (%)d | N (total) | 373 | 226 |
| Class A | 15 (4%) | 2 (0.9%) | |
| Class B1 | 23 (6.2%) | 14 (6.2%) | |
| Class B2 | 72 (19.3%) | 37 (16.4%) | |
| Class C1 | 128 (34.3%) | 66 (29.2%) | |
| Class C2 | 108 (29%) | 75 (33.2%) | |
| Class D-E | 27 (7.2%) | 32 (14.2%) | |
| χ2 = 14.347, p = 0.014*b | |||
| Body mass index | N (total) | 377 | 231 |
| Mean ± SD | 32.4 ± 7.3 | 32.7 ± 7.5 | |
| Min; max | 17.9; 71.7 | 17.7; 61.6 | |
| p = 0.458a | |||
| Charlson Comorbidity Index | N (total) | 367 | 219 |
| Mean ± SD | 3.1 ± 1.9 | 3.1 ± 1.8 | |
| Min; max | 1; 9 | 1; 11 | |
| p = 0.905a | |||
| WHO Clinical Progression Scale - n (%)e | N (total) | 377 | 231 |
| Group 1 | 42 (11.1%) | 31 (13.4) | |
| Group 2 | 163 (43.2%) | 109 (47.2%) | |
| Group 3 | 18 (4.8%) | 7 (3%) | |
| Group 4 | 154 (40.8) | 84 (36.4%) | |
| χ2 = 2.915, p = 0.405b | |||
| Length of inpatient stay (days) | N (total) | 377 | 231 |
| Mean ± SD | 18.9 ± 20.6 | 16.1 ± 14.4 | |
| Min; max | 1; 163 | 1; 99 | |
| p = 0.047*a | |||
| Number of days between discharge and follow-up | N (total) | 377 | 231 |
| Mean ± SD | 209.8 ± 44.6 | 210.8 ± 42.8 | |
| Min; max | 39; 349 | 92; 380 | |
| p = 0.787a | |||
| Post-COVID-19 Functional Status scale - n (%)f | N (total) | 377 | 230 |
| Grade 0 | 162 (43.0%) | 31 (13.5%) | |
| Grade 1 | 146 (38.7%) | 90 (39.1%) | |
| Grade 2 | 45 (11.9%) | 61 (26.5%) | |
| Grade 3 | 11 (2.9%) | 35 (15.2%) | |
| Grade 4 | 13 (3.4%) | 13 (5.7%) | |
| χ2 = 86.623, p < 0.001*b | |||
SMC subjective memory complaint, SD standard deviation, Min minimum, Max maximum.
*Statistically significant difference (p < 0.05).
aTwo-sided independent samples T-tests.
bPearson’s Chi-square test.
cPrimary/elementary education: first nine years of formal education in Brazil, conventionally beginning at about age 6; secondary education: three years of formal education for primary/elementary school graduates in Brazil, conventionally beginning at about age 15.
dSix decreasing categories, assessed in accordance to current Brazilian Economic Classification Criteria [46]. Average Household Monthly Income for each category: A = R$ 21,826.74 or above (approx. US$ 4,034.51);
B1 = R$ 10,361.48 (approx. US$ 1,915.24); B2 = R$ 5,755.23 (approx. US$ 1,063.81); C1 = R$3,276.76 (approx. US$ 605.68); C2 = R$ 1,965.87 (US$ 363.37); D-E = R$ 900.60 or below (approx. US$ 166.46).
eWHO Clinical Progression Scale; Group 1: WHO 3-4 did not need oxygen during hospitalization; Group 2: WHO 5 supplemented oxygen by catheter or mask; Group 3: WHO 6 other non-invasive ventilatory support; Group 4: WHO 7-9 required invasive assistance [38].