Towards a Standard Psychometric Diagnostic Interview for Subjects at Ultra High Risk of Psychosis: CAARMS versus SIPS
Table 4
Equipercentile-linking table comparing symptoms severity and frequency across CAARMS 12/2006 and SIPS 5.0 in the OASIS and CAMEO sample.
Domain
Severity scores
Frequency scores
CAARMS to
SIPS
SIPS to
CAARMS
CAARMS to
SIPS
SIPS to
CAARMS
P1 CAARMS to P1 SIPS & P1 SIPS to P1 CAARMS
0
0.012
0
0.011
0
0.019
0
0.017
1
1.092
1
0.916
1
0.718
1
1.690
2
2.212
2
1.816
2
1.163
2
3.321
3
3.258
3
2.759
3
1.781
3
5.282
4
4.180
4
3.799
4
2.481
5
5.019
5
4.976
5
2.899
6
5.965
6
6.033
6
3.289
P2 CAARMS to P2 SIPS
0
0.026
0
0.028
1
1.059
1
0.602
2
2.234
2
1.001
3
3.216
3
1.669
4
4.105
4
2.406
5
5.956
5
2.861
6
5.961
6
3.271
P2 CAARMS to P3 SIPS
0
0.041
0
0.004
1
0.124
1
0.027
2
0.178
2
0.071
3
0.112
3
0.106
4
0.297
4
0.237
5
0.464
5
0.469
6
2.692
6
2.462
P2/P3 SIPS to P2 CAARMS
0
0.007
0
0.062
1
0.919
1
1.779
2
1.778
2
3.541
3
2.735
3
5.478
4
3.806
5
4.991
6
6.025
P3 CAARMS to P4 SIPS & P4 SIPS to P3 CAARMS
0
0.012
0
0.013
0
0.007
0
0.007
1
0.893
1
1.112
1
0.625
1
1.984
2
1.891
2
2.106
2
1.001
2
3.347
3
2.953
3
3.045
3
1.701
3
4.899
4
3.944
4
4.059
4
2.537
5
4.861
5
5.153
5
3.034
6
5.876
6
6.099
6
3.530
P4 CAARMS to P5 SIPS & P5 SIPS to P4 CAARMS
0
0.067
0
0.079
0
0.080
0
0.095
1
0.855
1
1.126
1
0.594
1
1.743
2
1.981
2
2.017
2
1.133
2
3.612
3
3.032
3
2.968
3
1.666
3
5.234
4
4.064
4
3.936
4
2.193
5
5.158
5
4.844
5
2.798
6
6.090
6
5.889
6
3.472
P1–P4 on the CAARMS and P1–P5 on SIPS are defined in Table 1; using the highest score across P2 and P3 SIPS. For analytical purposes in this table the SIPS frequency was coded as follows: 1: ≥1 h/d, ≥4 d/wk; 2: ≥several minutes/d, ≥1x/mo; 3: ≥1x/wk; 0: none of the above.
