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Table 1 Item description and scaling properties of the questionnaires extracted from the validation phase (26 item version) and from the replication phase

From: Construction of a questionnaire measuring outpatients' opinion of quality of hospital consultation departments

 

Intermediate questionnaire 26-items retained at the and of the first validation phase (first study, n = 1007)

Final questionnaire 27-item questionnaire tested at the replication phase (second study, n = 248)

Title of the scales

Consultation with the doctor

Appointment making

Reception

Waiting time & facilities

Overall scale

Consultation with the doctor

Appoint-ment making

Reception & facilities

Waiting time

Overall scale

Items properties

          

# of items in the scale

13

6

3

4

26

13

6

5

3

27

# of questionnaires with at least 1/2 of items completed (1)

996

931

1004

1001

1003

235

248

247

244

248

# of items with 'non response' ≥ 20%

0

0

0

0

0

0

0

0

0

0

# of item with 'does not apply' response ≥ 20%

0

2

0

0

2

1

0

0

0

1

# of items with ceiling effect ≥ 50% (≥ 60%)

13 (12)

6 (4)

3 (2)

0 (0)

22 (18)

12 (4)

1 (1)

2 (0)

0 (0)

15 (5)

# of items floor effect ≥ 50%

0

0

0

0

 

0

0

0

0

0

range of Weighted kappa (# of items with kappa ≥ 0.60)

0.14–0.83 (10)

0.46–0.77 (3)

0.45–0.78 (1)

0.68–0.82 (4)

0.14–0.82 (18)

-

-

-

-

 

Scaling properties

          

Mean score (± sd)

85.1 (17.2)

83.2 (19.9)

88.0 (14.5)

69.6 (24.9)

82.7 (13.7)

84.1 (17.2)

80.6 (18.5)

75.3 (18.3)

61.3 (19.6)

78.9 (15.3)

Ceiling / floor effect (%)

26.2 / 0.10

32.2 / 0.2

38.5 / 0.1

16.2 / 1.1

4.2 / 0.1

25.8 / 0.4

24.7 / 0.4

13.7 / 0.5

19.0 / 4.9

4.4 / 0.4

Skewness value /SE

-3.00

-2.09

-3.5

-0.86

-2.67

-0.98

-0.83

-0.58

-0.20

-0.76

Range of interscale correlations

0.33–0.35

0.34–0.37

0.35–0.40

0.33–0.40

-

0.46–0.51

0.51–0.59

0.42–0.49

0.42–0.53

-

# of items with own scale correlation ≥ 0.40 (3)

12

6

2

4

-

13

6

5

3

-

# of items with own scale (3) correlation greater than with other scale

13

6

3

4

-

13

6

4

3

-

Cronbach alpha coefficient

0.85

0.82

0.69

0.77

0.88

0.94

0.87

0.79

0.89

0.94

Intraclass coefficient [IC95%]

0.69 [0.49–0.83]

0.84 [0.71–0.91]

0.86 [0.75–0.92]

0.83 [0.71–0.91]

0.90 [0.81–0.94]

-

-

-

-

 
  1. (1) Including non response and 'does not apply' response' (2) From the final principal component factor analysis (3) Corrected for overlap