| 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
# 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
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] | - | - | - | - |  |