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Table 2 Prevalence of different types of bullying in pre- and post-intervention, and percentage changes, among the 402 students of the nine institutions enrolled in the BIAS study

From: Effects of an intervention to prevent the bullying in first-grade secondary schools of Palermo, Italy: the BIAS study

Area

Method

Pre

n (%)

Post

n (%)

% difference

Physical bullying

Sentinel question

13 (3.2)

6 (1.5)

- 1.7

Five-question

103 (25.6)

86 (21.4)

- 4.2

Score of seven

141 (31.5)

118 (29.4)

- 2.1

Verbal bullying

Sentinel question

55 (13.7)

44 (10.9)

- 2.8

Five-question

150 (37.3)

128 (31.8)

- 5.5

Score of seven

228 (56.7)

204 (50.7)

- 6

Indirect bullying

Sentinel question

41 (10.2)

36 (9)

- 1.2

Five-question

118 (29.4)

113 (28.1)

- 1.3

Score of seven

174 (43.3)

156 (38.8)

- 4.5

Observers

Sentinel question

54 (13.4)

30 (7.5)

- 5.9

Five-question

106 (26.4)

82 (20.4)

- 6

Score of seven

163 (40.5)

124 (30.8)

- 9.7

Resiliency

Sentinel question

120 (29.9)

134 (33.3)

+ 3.4

Five-question

192 (47.8)

178 (44.3)

- 3.5

Score of seven

246 (61.2)

223 (55.5)

- 5.7

Prosociality

Sentinel question

44 (10.9)

15 (3.7)

- 7.2

Five-question

313 (77.9)

385 (70.9)

- 7

Score of seven

347 (86.3)

325 (80.8)

- 5.5