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Table 1 Characteristics of the study population

From: Association of circulating let-7b-5p with major depressive disorder: a nested case-control study

Variable Total (n = 104) Case (n = 52) Control (n = 52) p-value
Age, years Mean (SD) 56.0 (2.78) 55.7 (2.57) 56.3 (2.97) 0.28a
BMI (kg/m2) c Mean (SD) 24.51 (3.92) 24.96 (3.86) 24.04 (3.98) 0.26a
Smoking (%) d 25.7 25.5 26.0 0.95b
Alcohol abuse (%) 19.2 17.3 21.2 0.62b
  1. Data are represented as mean (SD)
  2. SD standard deviation
  3. aStudent’s t-test
  4. bTwo-sided Chi-squared test
  5. cMissing information on BMI for 11 individuals
  6. dMissing information on smoking for 3 individuals