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Table 1 Demographic and clinical features of the subjects included in the study

From: The relationship between drive to thinness, conscientiousness and bulimic traits during adolescence: a comparison between younger and older cases in 608 healthy volunteers

Study subjects (n = 608) Early adolescence (age 14–16) N = 341 (56.08%) Late adolescence/early adulthood (age 17–19) N = 267(43.91%) T or χ 2(df = 2) p
Demographics     
 Age in years, mean ± sd 15.03 ± .81 17.74 ± .76 42.100(606) <0.001
 Sex F/M, n(%) 258(75.70 %)/83(24.3%) 178(66.70 %)/89(33.3%) 5.970(1) ns
 BMI, mean ± sd 21.13 ± 3.26 21.89 ± 3.34 2.580(503) ns
Bisantis' assertiveness test, mean ± sd     
 Passive (range) 41.76 ± 8.24(20–62) 42.24 ± 9.26(15–62) .674(606) ns
 Aggressive (range) 21.92 ± 5.32(6–39) 22.19 ± 5.09(1–32) .631(606) ns
 Assertive (range) 63.63 ± 9.12(36–85) 64.29 ± 10.40(18–84) .831(606) ns
Eating Disorder Inventory (EDI), mean ± sd     
 Drive to thinness (range) 5.64 ± 5.62(0–21) 4.21 ± 4.25(0–19) −3.465(606) .001
 Bulimia (range) 3.46 ± 3.72(0–16) 2.54 ± 3.00(0–14) −3.308(606) .001
 Body dissatisfaction (range) 7.99 ± 6.49(0–31) 7.43 ± 6.08(0–26) −1.092(606) ns
 Ineffectiveness (range) 4.67 ± 4.64(0–34) 4.42 ± 4.56(0–26) –.654(606) ns
 Perfectionism (range) 5.21 ± 3.59(0–16) 5.31 ± 3.22(0–15) .353(606) ns
 Interpersonal distrust (range) 5.74 ± 3.49(0–17) 5.23 ± 3.48(0–18) −1.801(606) ns
 Interocept awareness (range) 6.93 ± 5.78(0–28) 5.75 ± 5.04(0–26) −2.634(606) ns
 Maturity fears (range) 7.96 ± 3.90(0–19) 8.12 ± 4.39(0–22) .478(606) ns
 EDI (total score) (range) 47.53 ± 23.85(1–142) 42.66 ± 20.85(8–147) −2.637(606) ns
Liebowitz' Social Phobia Scale (LSPS), mean ± sd     
 Fear of relationship sub-scale (range) 14.87 ± 7.32(0–49) 13.91 ± 6.35(0–34) −1.708(606) ns
 Avoidance of relationship sub-scale (range) 13.87 ± 6.54(0–36) 13.02 ± 6.37(0–30) −1.595(606) ns
 Fear of performance sub-scale (range) 28.74 ± 12.93(1–80) 26.93 ± 11.44(0–63) −1.801(606) ns
 Avoidance of performance sub-scale (range) 12.47 ± 7.01(0–33) 11.82 ± 6.21(0–30) −1.202(606) ns
 Total fear sub-scale (range) 12.25 ± 6.34(0–33) 11.54 ± 6.05(0–31) −1.405(606) ns
 Total avoidance sub-scale (range) 24.68 ± 12.50(0–66) 23.36 ± 11.17(0–61) −1.357(606) ns
 LPSP total score (range) 53.18 ± 24.01(2–139) 50.15 ± 21.36(0–121) −1.620(606) ns
BigFive, mean ± sd     
 Extraversion (range) 81.88 ± 10.41(58–113) 78.25 ± 46(43–106) −2.628(226) ns
 Agreeableness (range) 77.69 ± 6.99(57–59) 75.39 ± 9.33(45–95) −2.095(226) ns
 Conscientiousness (range) 77.86 ± 9.90(53–101) 81.61 ± 8.92(57–101) 3.005(226) .003
 Neuroticism (range) 61.37 ± 12.50(39–93) 64.36 ± 11.27(33–93) 1.900(226) ns
 Openness to experience (range) 76.76 ± 8.14(61–101) 77.74 ± 9.68(55–101) .819(226) ns