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Table 1 Odds ratios for relational, verbal, physical and cyber bullying victimization by exposure to the law and by teacher intervention

From: Evaluation of Iowa’s anti-bullying law

Bullying type

Exposure to law

Model 1

Model 2

OR (95 % CI)

OR (95 % CI)

Relational

1 year post-law vs. Pre-law

1.27 (1.24, 1.30)

1.24 (1.21, 1.27)

3 years post-law vs. Pre-law

1.14 (1.11, 1.17)

1.08 (1.05, 1.11)

3 years post-law vs. 1 year post-law

0.90 (0.88, 0.92)

0.87 (0.85, 0.90)

Teacher intervention vs. No intervention

 

0.65 (0.64, 0.65)

Verbal

1 year post-law vs. Pre-law

1.32 (1.29, 1.36)

1.29 (1.26, 1.33)

3 years post-law vs. Pre-law

1.15 (1.12, 1.19)

1.10 (1.06, 1.13)

3 years post-law vs. 1 year post-law

0.87 (0.85,0.90)

0.85 (0.82, 0.87)

Teacher intervention vs. No intervention

 

0.64 (0.64, 0.65)

Physical

1 year post-law vs. Pre-law

1.32 (1.26, 1.38)

1.28 (1.22, 1.33)

3 years post-law vs. Pre-law

1.09 (1.04, 1.15)

1.03 (0.98, 1.08)

3 years post-law vs. 1 year post-law

0.83 (0.79, 0.87)

0.81 (0.77, 0.84)

Teacher intervention vs. No intervention

 

0.61 (0.60, 0.62)

Cyber

1 year post-law vs. Pre-law

1.49 (1.40, 1.58)

1.44 (1.36, 1.53)

3 years post-law vs. Pre-law

1.57 (1.48, 1.68)

1.47 (1.38, 1.57)

3 years post-law vs. 1 year post-law

1.06 (1.00, 1.12)

1.02 (0.96, 1.08)

Teacher intervention vs. No intervention

 

0.55 (0.54, 0.56)

  1. Model 1: Generalized Linear Mixed Models clustering on school district
  2. Model 2: Generalized Linear Mixed Models clustering on school district and controlled for grade, gender, ethnicity, and living situation