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Table 3 Baseline demographic data of patients enrolled in the REAL study

From: The REAL study: a nationwide prospective study of rheumatoid arthritis in Brazil

Demographic data Absolute value or % N
Age, years, median (range) 56.7 (22.1–88.8) 1115
Female gender, % 89.4 1115
Ethnicity/race/color, %   1115
 White 56.8  
 Pardoa 31.3  
 Black 10.9  
 Others 1.0  
Smoking, %   1115
 Smoker 10.9  
 Former smoker 28.6  
 Never smoked 60.5  
BMI categories, %   1046
 Low weight 5.0  
 Normal 31.5  
 Overweight 35.3  
 Obesity 28.2  
Total formal education time, years, median (range) 8 (0–20) 1075
Brazilian Economic Classification Criterion: Socioeconomic Strata: Gross family income in the month in US dollarb, %   1101
 A (5,921.00) 1.4  
 B1 (2623.00) 3.5  
 B2 (1357.00) 18.4  
 C1 (766.81) 27.4  
 C2 (460.65) 31.3  
 D-E (217.71) 18.0  
  1. aMixed white and black ethnicities. BMI Body mass index. bConversion of Brazilian reais into US dollars made in accordance with the exchange rate of April 16, 2016 - US$1,00: R$ 3,5276