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Table 1 Data Removed from Final Dataset (n = 7,348)

From: Use of NON-PARAMETRIC Item Response Theory to develop a shortened version of the Positive and Negative Syndrome Scale (PANSS)

Reason for Removal

Number of cases removed

Percent of cases removed

Mean age

(years)

Gender

Mean PANSS total score

Depressive Disorder

80

1.09%

26.87 (9.37)

Male (48.75%)

Female (51.25%)

68.76 (17.96)

Bipolar Disorder

76

1.03%

25.05 (10.00)

Male (53.95%)

Female (46.05%)

67.39 (16.17)

No Diagnoses provided

3

0.04%

Data unavailable

Male (66.67%)

Female (33.33%)

79.00 (28.00)

PANSS Item Score missing

2

0.03%

Data Unavailable

Male (100.00%)

28.00 (1.41)

Total

161

2.19%

25.97 (9.57)

Male (52.17%)

Female (47.83%)

68.30 (17.52)*

  1. Note. N = 7,348; *n = 159, does not include two patients with missing PANSS item scores.