PT - JOURNAL ARTICLE AU - Laura Leviton TI - Reconciling complexity and classification in quality improvement research AID - 10.1136/bmjqs.2010.046375 DP - 2011 Apr 01 TA - BMJ Quality & Safety PG - i28--i29 VI - 20 IP - Suppl 1 4099 - http://qualitysafety.bmj.com/content/20/Suppl_1/i28.short 4100 - http://qualitysafety.bmj.com/content/20/Suppl_1/i28.full SO - BMJ Qual Saf2011 Apr 01; 20 AB - Quality improvement (QI) research is often hampered by the complexity of the systems and context in which QI is attempted. Better classification of QI can alleviate this problem and help to build generalisable knowledge.