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Table 4 Secondary outcome measures

From: Blood test ordering for unexplained complaints in general practice: the VAMPIRE randomised clinical trial protocol. [ISRCTN55755886]

Incidence of unexplained complaints in general practice

Predictive value of GPs' working hypothesis

Duration of unexplained complaints

Effect of unexplained complaints on patients' quality of life

Effect of immediate testing or watchful waiting on patients' satisfaction with care, anxiety, medical consumption and sick leave

Effect of immediate testing or watchful waiting on GPs' satisfaction, anxiety and insecurity

Effect of quality improvement strategy on GPs' knowledge about the value of blood test ordering in unexplained complaints, communication skills and attitudes

Barriers to and facilitators of GPs proposing a watchful waiting strategy

Costs of the quality improvement strategy