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Table 2 Difference between non-IBS group and IBS subgroups in the personality scales

From: Effects of personality traits on the manifestations of irritable bowel syndrome

Variables Non-IBS group (n = 414) IBS group (n = 143) IBS subgroup p valuec
    D-IBS C-IBS A-IBS  
    (n = 24) (n = 50) (n = 69)  
Sex (male (%)) 64 48 § 58 32 55 p = 0.0001
Age 19 ± 1 19 ± 1 19 ± 1 19 ± 1 19 ± 1 p = 0.1479
IBS-SI 27.3 ± 39.8 53.9 ± 50.2 47.9 ± 39.5 ** 51.6 ± 56.0 ** 57.6 ± 49.3 ** p = 0.0001
K6a 4.9 ± 4.2 6.7 ± 5.0 8.3 ± 5.1 ** 5.5 ± 4.0 7.1 ± 5.4 ** p = 0.0001
 Persons with psychological distress (%)b 5 11 § 13 6 15 p = 0.0001
EPI - - - - - -
 Extroversion 27.6 ± 10.2 25.8 ± 10.4 25.3 ± 10.8 27.1 ± 9.2 25.1 ± 11.2 * p = 0.2228
 Neuroticism 21.4 ± 10.8 22.4 ± 10.4 26.0 ± 9.4 * ¶ 20.5 ± 11.5 22.5 ± 9.6 p = 0.1430
 Lie score 13.3 ± 5.7 13.4 ± 6.0 12.4 ± 5.8 14.1 ± 6.6 13.3 ± 5.7 p = 0.6855
  1. aPersons with scores of ≥13 points (out of a total 24 points) on the K6 were defined as experiencing psychological distress.
  2. bValues are the percentages of the total number of participants (i.e., IBS group plus non-IBS group).
  3. cOne-way ANOVA was performed using the data from the non-IBS group, and the groups with the diarrhea-type, constipation-type and alternating-type IBS.
  4. p < 0.01 vs. non-IBS group; *p < 0.05 and **p < 0.01 vs. non-IBS group, unpaired t-test.
  5. §p< 0.01 vs. non-IBS group, chi square test.
  6. p < 0.05 vs. C-IBS group, unpaired t-test.