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Table 3 Item difficulties with DIF-free and Fit MNSQ statistics of the 15 items in the 2003 English inpatient questionnaire of the Picker Institute Europe

From: Online assessment of patients' views on hospital performances using Rasch model's KIDMAP diagram

No. Category & Item Difficulty MNSQ   DIF-free
   Logit SE Infit Outfit PTME§ p-value*
  Admission to hospital       
2 How organized was the care you received in A&E? -0.95 0.15 1.05 1.18 0.7 .736
5 Were you given enough notice of your date of admission? -1.08 0.15 1.02 0.94 0.69 .968
9 You feel wait a long time to get to a bed on a ward? -0.63 0.14 1.2 1.1 0.74 .116
  The Hospital and Ward       
11 Ever bothered by noise at night from other patients? 1.58 0.13 1.50 1.50 0.74 .289
12 Bothered by noise at night form hospital staff? -1.1 0.15 1.02 1.02 0.69 .287
  Doctors       
17 Having confidence and trust in the doctors treating you? -1.1 0.15 0.61 0.66 0.79 .553
18 Doctors talked in front of you as if you weren't there? -1.12 0.15 1.12 1.07 0.67 .120
  Nurses       
19 You get answers that you could understand from a nurse? -1.12 0.15 0.56 0.57 0.8 .114
23 Staff saying one thing and another quite different happened to you? -1.1 0.15 0.98 0.89 0.71 .199
24 Were you involved to be in decisions about your care and treatment? 0.67 0.14 0.77 0.77 0.84 .068
27 Hospital staff talk about your worries and fears? 2.22 0.13 0.56 0.52 0.81 .364
30 How long after using call button before you got the help you needed? 0.42 0.14 0.91 1.21 0.66 .253
  Pain       
34 Hospital staff did everything they could to help you control your pain? -1.12 0.15 0.82 0.87 0.74 .906
  Leaving Hospital       
38 Staff explained the purpose of the medicines you could understand? -1.1 0.15 0.97 0.87 0.71 .972
39 Staff told you about medication side effects when going home? 3.78 0.13 1.22 1.16 0.81 .407
41 Doctors or nurses gave your family information needed to help you? 2.76 0.13 1.37 1.44 0.78 .090
42 Staff told you how to contact if worries happened after leaving? -0.3 0.14 1.33 1.19 0.73 .344
  Overall       
44 How would you rate well the doctors and nurses worked together? -0.71 0.14 0.75 0.67 0.8 .303
  Mean 0.00 0.14 0.99 0.98 0.75  
  SD 1.56 0.01 0.28 0.28 0.05  
  1. Note. *DIF CHI-square probability from TABLE 30.4 of WINSTEPS software
  2. §biserial correlations