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Table 1 Analysis by linear regression to evaluate the influence of demographic data in discourse

From: Influence of age and schooling in written discourse of healthy adults

Speech elementsβStandard errorpCI 95% (β)
No. of words   
 Males− 0.51.60.771− 3.7; 2.7
 Age range, 40–590.21.70.906− 3.1; 3.5
 Age range, 60–75− 1.12.10.582− 5.2; 3.0
 Education level, 9–116.81.8< 0.0013.2; 10.4
 Education level:,≥ 1220.11.8< 0.00116.5; 23.7
Production time   
 Males− 1.87.20.801− 15.9; 12.3
 Age range, 40–597.97.50.291− 6.8; 22.7
 Age range, 60–7523.89.30.0115.6; 42.0
 Education level, 9–1110.28.10.212− 5.8; 26.2
 Education level, ≥ 1236.18.1< 0.00120.1; 52.0
Number of IU   
 Males0.10.20.550− 0.3; 0.5
 Age range, 40–59− 0.10.20.777− 0.5; 0.4
 Age range, 60–750.00.30.955− 0.5; 0.5
 Education level, 9–111.30.2< 0.0010.9; 1.8
 Education level, ≥ 122.30.2< 0.0011.9; 2.8
Number of elements  
 Males0.00.10.784− 0.2; 0.1
 Age range, 40–590.00.10.803− 0.2; 0.1
 Age range, 60–75− 0.10.10.313− 0.3; 0.1
 Education level, 9–110.50.1< 0.0010.3; 0.7
 Education level, ≥ 120.80.1< 0.0010.7; 1.0
  1. Age in years, reference group, 19–39 years
  2. Education level in years, reference group, 5–8 years