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Table 1 Domains addressed in the questionnaire, number of items per domain, and number of significant differences between numbered and non-numbered surveys

From: Effect of numbering of return envelopes on participation, explicit refusals, and bias: experiment and meta-analysis

Domain

Items

Number of significant differences

Numbering associated with…

Time since event that caused regret

1

0

 

Consequences for patient

9

1

Extended hospital stay less frequent

Type of event

7

0

 

Error committed

1

0

 

Intensity and manifestations of regret

19

7

Lower intensity (all 7 differences)

Numerical scales measuring various aspects of regret

5

1

Lower sense of responsibility

Number of regretted situations

1

0

 

Coping strategies

31

2

More acceptance

Greater sense of having done one’s best

Life satisfaction

5

0

 

Work satisfaction

4

0

 

Sleep

9

1

Less frequent bad dreams

Self-esteem

1

0

 

Depression

10

0

 

Self-rated health

1

0

 

Absence from work

1

0