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Table 2 Data extracted at stage four

From: Measuring organizational and individual factors thought to influence the success of quality improvement in primary care: a systematic review of instruments

Data extracted Description1
Instrument development Methods used to generate items (e.g., items derived from existing instruments; new items generated from data from interviews or comprehensive review of theory)
  Methods used to refine instrument
Administration & scoring Method of administration (e.g., self-administered, facilitated)
Feasibility of administration (e.g., researcher time, resources)
Acceptability to respondents (e.g., views on burden and complexity)
Methods of scoring and analysis
Measurement properties Methods and findings of assessments of:
Content validity (e.g., clear description of content domain and theoretical basis, expert assessment of items for relevance and comprehensiveness)
Construct validity
- Instrument structure (e.g., using factor analytic methods)
- Hypothesis testing (e.g., whether scores on the instrument converge with measures of theoretically related variables, discriminate between groups, predict relevant outcomes)
Reliability (e.g., internal consistency, stability over time, inter-rater)
Other assessments Interpretability (potential for ceiling and floor effects; guidance on what constitutes an important change or difference in scale scores)
Generalizability (sampling methods, description of sample, and response rate reported)
  1. 1 Definitions and further explanation of the extracted measurement properties are provided in Additional file 3.