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Table 4 General population-based parental norms for the SDQ

From: Psychometric properties of online administered parental strengths and difficulties questionnaire (SDQ), and normative data based on combined online and paper-and-pencil administration

  10-years old 11-years old 12-years old 13-years old
Emotional Symptoms Girls n = 154 Boys n = 159 Girls n = 232 Boys n = 206 Girls n = 158 Boys n = 159 Girls n = 179 Boys n = 186
M (SD) Mdn* 1.6 (1.8) 1.0 1.3 (1.7) 1.0 1.5 (1.8) 1.0 1.6 (1.9) 1.0 1.7 (1.7) 1.0 1.6 (1.8) 1.0 1.7 (1.9) 1.0 1.4 (1.7)* 1.0
80th percentile 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.0
85th percentile 4.0 3.0 3.0 4.0 3.5 3.0 3.0 3.0
90th percentile 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0
95th percentile 5.0 5.0 5.5 5.0 5.0 5.0 5.0 5.0
Conduct Problems         
M (SD) Mdn* 1.1 (1.4) 1.0 1.0 (1.2) 1.0 1.0 (1.3) 1.0 1.0 (1.2) 1.0 1.2 (1.2) 1.0 1.3 (1.6) 1.0 1.3 (1.4) 1.0 1.0 (1.2) 1.0
80th percentile 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
85th percentile 2.0 2.0 2.0 2.6 2.0 3.0 3.0 2.0
90th percentile 3.0 3.0 2.0 3.0 3.0 4.0 3.0 3.0
95th percentile 4.0 4.0 4.0 3.0 4.0 5.0 4.0 3.0
Hyperactivity-Inattention         
M (SD) Mdn* 2.1 (2.0) 2.0 2.6 (1.9) 2.0 2.1 (2.1) 2.0 2.7 (2.3) 2.0 2.1 (2.1) 2.0 2.6 (2.2) 2.0 2.1 (2.1) 2.0 2.5 (2.1) 2.0
80th percentile 3.2 4.0 4.0 5.0 4.0 4.0 4.0 4.0
85th percentile 4.0 5.0 4.0 5.0 4.5 5.0 4.0 5.0
90th percentile 5.0 5.0 5.0 6.0 5.0 6.0 5.0 5.0
95th percentile 6.0 6.0 6.5 7.0 7.0 7.0 6.2 7.0
Peer Problems         
M (SD) Mdn* 1.1 (1.8) 0.0 1.2 (1.7) 1.0 1.1 (1.5) 0.0 1.3 (1.5) 1.0 1.1 (1.5) 1.0 1.4 (1.9) 1.0 1.5 (1.8) 1.0 1.4 (1.7) 1.0
80th percentile 2.0 2.0 2.0 2.0 2.0 3.0 3.0 3.0
85th percentile 2.0 3.0 3.0 3.0 2.5 3.0 3.0 3.0
90th percentile 3.1 3.1 3.0 3.7 3.0 4.0 4.0 4.0
95th percentile 5.0 5.0 4.0 4.9 5.0 6.0 5.0 5.0
Prosocial Behavior         
M (SD) Mdn* 8.6 (1.5) 9.0 8.2 (1.9) 8.0 8.6 (1.6) 9.0 8.2 (1.7) 8.0 8.6 (1.5) 9.0 8.2 (1.9) 9.0 8.4 (1.7) 9.0 8.3 (1.7) 9.0
20th percentile 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0
15th percentile 7.0 6.0 7.0 6.0 7.0 6.0 6.0 6.2
10th percentile 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0
5th percentile 6.0 4.0 5.0 5.0 5.0 5.0 5.0 5.0
Total Difficulties         
M (SD) Mdn* 5.8 (5.2) 4.0 6.1 (4.6) 5.0 5.7 (5.0) 4.0 6.6 (5.1) 5.5 6.1 (4.7) 5.0 6.9 (6.0) 5.0 6.6 (5.5) 5.0 6.3 (4.8) 5.0
80th percentile 9.0 9.0 9.0 11.0 10.0 10.0 11.0 10.0
85th percentile 11.0 11.0 10.0 12.0 12.0 13.0 12.0 11.0
90th percentile 13.0 12.0 13.0 14.0 14.0 17.0 13.0 13.9
95th percentile 16.0 14.1 16.0 15.9 15.0 19.2 18.0 15
  1. *M = Mean, SD = Standard Deviation, Mdn = Median.