Table 4

Conversion table for the Difficulty scale of the SDQ-P

Original Total Difficulty score
(ordinal data)
Logit scores
(interval level data)
Converted logit scores to 0–40 scale
(interval level data)
0−4.4830
1−3.6554
2−3.0827
3−2.6858
4−2.37510
5−2.11711
6−1.89512
7−1.69913
8−1.52214
9−1.3615
10−1.20915
11−1.06816
12−0.93516
13−0.80917
14−0.68718
15−0.57118
16−0.45719
17−0.34719
18−0.2420
19−0.13420
20−0.02921
210.07521
220.17822
230.28222
240.38623
250.49223
260.59924
270.70924
280.82225
290.9425
301.06426
311.19626
321.33727
331.49128
341.66329
351.85929
362.0931
372.37332
382.74634
393.30136
404.12540
  • SDQ-P, Strengths and Difficulties Questionnaire  parents.