Figure 1.

Figure 2.

Figure 3.

Frequency and impact of psychosomatic symptoms among students by role in bullying_
| Neutral | Victim | Bully | Bully/Victim | p* | |
|---|---|---|---|---|---|
| Frequency | |||||
| Pseudoneurological | 1.11a [0.3] | 1.44b [1] | 1.22b,c [0.5] | 1.33c [0.9] | <0.001 |
| Cardiovascular | 1.33a [1] | 2b [1.3] | 1.67a,b [1] | 2b [1.3] | <0.001 |
| Musculoskeletal | 1a [0.5] | 1.5c [1.5] | 1a,b [0.5] | 1.5b,c [1.5] | <0.001 |
| Respiratory | 1.33a [0.3] | 1.67b [1] | 1.33a [0.3] | 1.67b [0.3] | <0.001 |
| Gastrointestinal | 1.33a [0.6] | 1.67c [0.7] | 1.39a,b [0.6] | 1.56b,c [0.8] | <0.001 |
| Dermatological | 1.33a [1] | 1.67b [1] | 1.33a,b [1] | 1.5b [1] | <0.001 |
| Pain/Fatigue | 1.67a [0.7] | 2.17b [1] | 1.83a [0.7] | 2.17b [0.8] | <0.001 |
| Interference | |||||
| Pseudoneurological | 1.11a [0.3] | 1.33c [0.7] | 1.22b [0.6] | 1.22b,c [0.8] | <0.001 |
| Cardiovascular | 1.33a [0.7] | 1.67c [0.7] | 1.33a,b [0.7] | 1.67b,c [1] | <0.001 |
| Musculoskeletal | 1a [0.5] | 1.5b [1] | 1a,b [0.5] | 1b [1] | <0.001 |
| Respiratory | 1.33a [0.7] | 1.67c [1] | 1.33a,b [0.7] | 1.67b,c [1] | <0.001 |
| Gastrointestinal | 1.22a [0.4] | 1.44c [0.7] | 1.22a,b [0.8] | 1.39b,c [0.7] | <0.001 |
| Dermatological | 1a [0.7] | 1.33c [1] | 1.17a,b [0.7] | 1.33b,c [1] | <0.001 |
| Pain/Fatigue | 1.5a [0.7] | 1.83b [0.8] | 1.67b [0.7] | 1.83b [0.7] | <0.001 |
Overview of instruments used in the study_
| Instrument | Developer/Year | Language | Target Age | Scales / Dimensions | Cronbach’s α | Validation |
|---|---|---|---|---|---|---|
| School Violence Questionnaire (SVQ 2003) [20] | Child Protection Centre of Zagreb (2003) | Croatian | 12–15 | 11 aggressive behaviours grouped into 5 violence types | 0.84 | Validated in Croatian |
| Trauma Symptom Checklist for Children (TSCC-A) [21] | Briere (1996); Croatian edition by Buljan Flander & Profaca | Croatian | 8–16 | 44 items / 6 subscales: anxiety, depression, anger, PTSD, overt and fantasy dissociation | 0.82–0.89 | Validated and standardised in Croatian |
| Psychosomatic Symptoms Scale (PSS) [23] | Vulić-Prtorić (2019) | Croatian | 10–18 | 35 items in 7 somatic domains (frequency and interference) | 0.89–0.91 | Validated for the Croatian population |
Sociodemographic characteristics of students by role in bullying_
| N (%) | Neutral | Victim | Bully | Bully/Victim | p* |
|---|---|---|---|---|---|
| Gender | |||||
| Male | 887 (48.0)a | 134 (43.2)a | 50 (69.4)a | 56 (54.9)a,b | <0.001 |
| Female | 960 (52.0)a | 176 (56.8)a | 22 (30.6)a | 46 (45.1)a,b | |
| Family structure | |||||
| Both parents | 1648 (89.2)a | 266 (85.8)a,b | 60 (83.3)a,b | 82 (80.4)b | 0.011 |
| Other | 199 (10.8)a | 44 (14.2)a,b | 12 (16.7)a,b | 20 (19.6)b | |
| Siblings | |||||
| 0 | 172 (9.3) | 28 (9) | 10 (13.9) | 11 (10.8) | 0.308 |
| 1 | 744 (40.3) | 111 (35.8) | 26 (36.1) | 32 (31.4) | |
| 2 | 563 (30.5) | 110 (35.5) | 18 (25) | 39 (38.2) | |
| 3 or more | 368 (19.9) | 61 (19.7) | 18 (25) | 20 (19.6) | |
| Area of residence | |||||
| Urban | 1177 (63.7) | 201 (64.8) | 46 (63.9) | 78 (76.5) | 0.076 |
| Rural | 670 (36.3) | 109 (35.2) | 26 (36.1) | 24 (23.5) | |
| Grade level | |||||
| 7th | 621 (33.6)a | 112 (36.1)a | 13 (18.1)b | 20 (19.6)b | 0.001 |
| 8th | 628 (34.0)a | 96 (31)a | 24 (33.3)a | 36 (35.3)a | |
| 9th | 598 (32.4)a | 102 (32.9)a,b | 35 (48.6)b | 46 (45.1)b | |
| Academic performance | |||||
| 1 (Fail) | 61 (3.3)a | 7 (2.3)a | 3 (4.2)a | 5 (4.9)a | 0.005 |
| 2 (Poor) | 58 (3.1)a | 10 (3.2)a | 1 (1.4)a | 8 (7.8)a | |
| 3 (Satisfactory) | 398 (21.5)a | 87 (28.1)a | 23 (31.9)a | 25 (24.5)a | |
| 4 (Very good) | 638 (34.5)a | 96 (31)a | 32 (44.4)a | 30 (29.4)a | |
| 5 (Excellent) | 692 (37.5)a | 110 (35.5)a | 13 (18.1)b | 34 (33.3)a,b | |
