Table 4 .
Bladder complications (scale) items and IRT parameters
| Item ID | Response set* | Item stem | Item response theory calibration statistics |
||||
|---|---|---|---|---|---|---|---|
| Slope | Threshold 1 | Threshold 2 | Threshold 3 | Threshold 4 | |||
| rToiletBL_21 | A | A UTI (urinary tract infection) limited my daily activities | 1.50995 | −0.33428 | 0.28333 | 1.25659 | 2.03664 |
| rToiletBL_28 | A | I had an increase in spasms because of a UTI (urinary tract infection) | 1.50995 | −0.09740 | 0.43821 | 1.21022 | 1.84015 |
| rToiletBL_74 | B | I had a urinary tract infection (UTI) that would not go away | 1.50995 | 0.23983 | 0.97059 | 1.71530 | 2.46737 |
| rToiletBL_Com3 | B | Bladder issues limited my sex life | 1.50995 | 0.76965 | 1.23460 | 1.75779 | 2.17097 |
| rToiletBL_Com9 | B | I avoided going out because of my urinary tract infection (UTI) | 1.50995 | 0.74972 | 1.46888 | 2.26813 | 3.33743 |
*Context for all items was: ‘Lately’. All items were scored 1–5. Response set A was: Not at all/A little bit/Somewhat/Quite a bit/Very much. Response set B was: Never/Rarely/Sometimes/Often/Always.
The Bladder Complications scale also contains a screener item, rToiletBL_50: ‘I had a urinary tract infection’ (Response set B).
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