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Table 4 The results of automated item selection procedure

From: Item response analysis of the Geriatric Anxiety Inventory among the elderly in China: dimensionality and differential item functioning test

cResultsItem Numbers
Scale 1Scale 2Scale 3Scale 4Unscalable
0–0.41: 201–20    
0.451: 191–11, 12–20   12
0.5–0.552:16, 23–11, 13–17, 19–2012, 18  1, 2
0.62:14, 23, 5, 6–11, 13, 15–17, 19–2012, 18  1, 2, 4, 14
0.654: 9, 2, 2, 28–11, 13, 15–17, 1912, 183, 46, 71, 2, 5, 20
0.73: 7, 3, 28–9, 13, 15–17, 193, 10, 1112, 18 1, 2, 4–7, 14, 20
0.754: 4, 2, 2, 28–9, 17, 193, 1015, 1612, 181, 2, 4-7, 11, 13-14, 20
0.82: 2, 29, 178, 19  1–7, 10–16, 18, 20
0.851: 29, 17   1–8, 10–16, 18–20
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