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Table 1 Participant demographic characteristics

From: Sex-specific association of hair cortisol concentration with stress-related psychological factors in healthy young adults

Variable Total (n = 205) Men (n = 102) Women (n = 103) pd
Age, mean (SD), years 23.0 (2.6) 23.4 (2.5) 22.7 (2.6) 0.053
Education, n
 High school graduation 9 3 6 0.105
 College education (some) 141 78 63
 College graduation 46 19 27
 Graduate school education (some) 6 2 4
 Graduate school graduation 3 0 3
HCC, median (IQR), pg/μg 5578.2 (6093.8) 5256.3 (5985.3) 5787.8 (5963.7) 0.286
Stress-related psychological measures
 K-SRRSa, median (IQR) 316.5 (420.5) 298.5 (412.8) 333.5 (403.0) 0.371
 PSSb, mean (SD) 25.6 (5.7) 25.1 (5.6) 26.0 (5.8) 0.243
 BDIc, median (IQR) 3.0 (7.0) 3.0 (7.0) 4.0 (6.8) 0.098
 SAIb, mean (SD) 36.6 (9.1) 36.9 (9.4) 36.3 (8.8) 0.654
 TAIb, mean (SD) 41.0 (7.3) 41.1 (7.7) 40.9 (7.0) 0.824
 DERSb, mean (SD) 73.3 (18.0) 72.6 (16.9) 73.9 (19.0) 0.623
  1. aK-SRRS data were available for 100 men and 102 women
  2. bPSS, SAI, TAI, and DERS data were available for 101 men and all women
  3. cBDI data were available for all men and 102 women
  4. dp-value was calculated by comparing sexes using independent t-test for age, PSS, SAI, TAI, and DERS, Mann–Whitney U test for HCC, K-SRRS, and BDI, and Chi-square test for level of education
  5. BDI Beck Depression Inventory, DERS Difficulty in Emotion Regulation Scale, HCC hair cortisol concentration, IQR interquartile range, K-SRRS Korean version of the Social Readjustment Rating Scale, PSS Perceived Stress Scale, SAI State Anxiety Inventory, SD standard deviation, TAI Trait Anxiety Inventory