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Table 4 Comparison of outcomes at a single time point (T2 or T3)

From: Decision aids for second-line palliative chemotherapy: a randomised phase II multicentre trial

Measure (answer scale)1

Intervention group

N (%) or mean (SD)

Control group

N (%) or mean (SD)

p value

A dditional outcome measures: measurements at T2

n=68

n=40

 

Coping: Involvement

 Perceived involvement: perception of being offered a choice (yes/no)2

45 (66%)

26 (67%)

0.959

 Perceived involvement: perception whether patient’s opinion mattered (yes/no)2

51 (75%)

30 (77%)

0.823

Information-related measures

 Undesired information (yes/no)

6 (10%)

7 (18%)

0.244

 Balanced presentation of information (1-5)

2.7 (0.7)

2.4 (1.1)

0.201

 Evaluation of information on treatment options: unpleasant (1-5)

2.1 (1.0)

2.2 (1.2)

0.679

 Evaluation of information on treatment options: shocking (1-5)

2.3 (1.0)

2.3 (1.0)

0.958

 Evaluation of information on treatment options: frightening (1-5)

2.4 (0.9)

2.2 (1.0)

0.347

 Evaluation of information on severe adverse events: threatening (1-5)

2.5 (1.0)

2.7 (1.1)

0.358

 Evaluation of information on tumour response: threatening (1-5)

2.7 (1.1)

2.7 (1.0)

0.786

 Evaluation of information on survival: threatening (1-5)

3.0 (1.3)

2.6 (1.3)

0.112

Knowledge

 Objective knowledge (1-5)

3.4 (1.3)

3.5 (1.3)

0.684

 Subjective risk perception: severe adverse events (1-5)

2.2 (0.7)

2.0 (0.8)

0.242

 Subjective risk perception: tumour response (1-7)

1.8 (1.1)

2.1 (1.1)

0.219

 Subjective risk perception: pain (1-7)

3.0 (1.2)

3.2 (1.3)

0.461

 Objective risk perception: diarrhoea (0-100%)3

30.9 (22.1)

34.9 (22.1)

0.366

 Objective risk perception: tumour response (0-100%)3

30.0 (20.8)

32.5 (14.3)

0.463

Decision-related measures

 Treatment choice: undecided (vs. decided)

1 (2%)

4 (10%)

0.068

 Treatment choice: chemotherapy (vs. no chemotherapy)

63 (96%)

31 (84%)

0.067

 Strength of treatment preference (1-5)

3.0 (1.0)

2.5 (1.2)

0.030

Additional outcome measures: measurements at T3

n=58

n=33

 

Coping: Involvement

 Perceived involvement: perception of being offered a choice (yes/no)2

41 (71%)

20 (61%)

0.299

 Perceived involvement: perception whether patient’s opinion mattered (yes/no)2

47 (81%)

25 (76%)

0.525

Decision-related measures

 Treatment received: chemotherapy and BSC (vs. BSC alone)

50 (88%)

26 (84%)

0.746

Treatment attitudes toward the treatment received

 Treatment satisfaction: received treatment (1-6)

4.6 (1.3)

4.6 (1.0)

0.794

 Treatment satisfaction: physical consequences of treatment (1-6)

3.8 (1.5)

3.5 (1.3)

0.372

 Treatment satisfaction: emotional consequences of treatment (1-6)

4.0 (1.4)

3.9 (1.3)

0.725

  1. Abbreviation: BSC best supportive care
  2. 1More information on the scales can be found in Table 1
  3. 2Measured at T2 and T3
  4. 3Objective risk perception represents the absolute deviance between patient’s risk perception and actual risk as presented in the DA, based on literature reviews [7, 8]
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BMC Medical Informatics and Decision Making

ISSN: 1472-6947

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