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Table 2 Difficulty parameters of F-SCHNOS-O item – Rating Scale Model RSM (n = 165)

From: Translation, cultural adaptation and validation of the SCHNOS in French

Item Step Difficulty p-value 95% CI
SCHNOS 1 1 vs. 0 −0.27 0.020 −0.50 −0.04
2 vs. 1 −0.37 0.003 −0.61 − 0.13
3 vs. 2 0.04 0.749 −0.19 0.26
4 vs. 3 0.43 < 0.001 0.22 0.65
5 vs. 4 1.37 < 0.001 1.09 1.66
SCHNOS 2 1 vs. 0 −0.08 0.486 −0.30 0.14
2 vs. 1 −0.18 0.131 −0.42 0.05
3 vs. 2 0.23 0.047 0.00 0.45
4 vs. 3 0.62 < 0.001 0.40 0.85
5 vs. 4 1.56 < 0.001 1.26 1.87
SCHNOS 3 1 vs. 0 −0.26 0.022 −0.49 −0.04
2 vs. 1 −0.37 0.003 −0.61 −0.13
3 vs. 2 0.04 0.719 −0.18 0.26
4 vs. 3 0.44 < 0.001 0.22 0.66
5 vs. 4 1.38 < 0.001 1.09 1.66
SCHNOS 4 1 vs. 0 −0.17 0.146 −0.39 0.06
2 vs. 1 −0.27 0.027 −0.51 −0.03
3 vs. 2 0.14 0.220 −0.08 0.36
4 vs. 3 0.54 < 0.001 0.32 0.76
5 vs. 4 1.48 < 0.001 1.18 1.77