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Table 1 Descriptive statistics for sociodemographic, family, school and peer covariates, stratified by gender

From: Gender-specific substance use patterns and associations with individual, family, peer, and school factors in 15-year-old Portuguese adolescents: a latent class regression analysis

Covariates

Boys (n = 680; 43.8%)

Girls (n = 873; 56.2%)

χ2/t

p

Age

15.46 (0.34)

15.47 (0.34)

− 0.472

0.637

Family Affluence Scale score (range 0–9)

6.04 (1.77)

5.93 (1.86)

1.174

0.241

Family structure

0.338

0.561

 Living with both parents

76.8%

78%

 Other

23.2%

22%

Communication with mother

3.322

0.19

 Good

72.2%

72.2%

 Poor

20%

22.8%

 Do not have or see

3.1%

1.9%

Communication with father

74.985

< 0.001

 Good

59.4%

38.6%

 Poor

30.4%

51.4%

 Do not have or see

7.1%

7.9%

Good school satisfaction

70%

79.8%

18.789

< 0.001

Good perceived academic achievement

45.3%

42%

1.713

0.191

Bullying (at least once)

35.3%

20.9%

41.201

< 0.001

Victimisation (at least once)

37.5%

27.9%

17.209

< 0.001

Fighting (at least once)

32.2%

15%

68.732

< 0.001

Psychological symptomsa (range 4–20)

7.36 (3.42)

8.885 (3.77)

− 8.2923

< 0.001

Somatic symptomsb (range 4–20)

5.78 (2.5)

7.231 (3.36)

− 9.7211

< 0.001

  1. Significant values are shown in italics
  2. Results presented in percentage or mean (standard deviation). χ2—Chi square test value. t—T test statistic. p—p-value
  3. a4-item checklist (feeling low or depressed, feeling irritable or bad tempered, feeling nervous, sleeping difficulties in the past 6 months); higher score meaning more symptoms
  4. b4-item checklist (headache, backache, stomachache, dizziness, in the past 6 months); higher score meaning more symptoms