Table 1 Studies using the CUSUM as an evaluation tool for interventional and surgical procedures.

Author	Year of publication	Country of origin	Objective	Design	Specialty	Unit under control
Parry35	1991	New Zealand	Learning curve analysis	Retrospective	Endoscopy	Care provider
Parry36	1993	Singapore	Learning curve analysis	Retrospective	Endoscopy	Care provider
de Leval37	1994	UK	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Kestin38	1995	UK	Learning curve analysis	Prospective	Anaesthesia	Care provider
Van Rij39	1995	New Zealand	Learning curve analysis	Retrospective	General surgery	Care provider
Atherton40	1996	UK	Learning curve analysis	Prospective	Anaesthesia	Care provider
Schlup41	1997	New Zealand	Learning curve analysis	Retrospective	Endoscopy	Care provider
Poloniecki42	1998	UK	Quality control	Retrospective	Cardiovascular surgery	Centre
Novick43	1999	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Bartlett44	2001	New Zealand	Learning curve analysis	Retrospective	General surgery	Centre
Novick45	2001	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Ravn46	2001	Netherlands	Learning curve analysis and quality control	Prospective	Anaesthesia	Care provider
de Oliveira Filho47	2002	Brazil	Learning curve analysis	Prospective	Anaesthesia	Care provider
Forbes48	2002	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Novick49	2002	Canada	Quality control	Retrospective	Cardiovascular surgery	Care provider
Novick50	2002	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Robinson51	2002	UK	Quality control	Retrospective	OHN surgery	Care provider
Naik52	2003	Canada	Learning curve analysis	Prospective	Anaesthesia	Care provider
Novick53	2003	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Centre
Sharp54	2003	UK	Quality control	Retrospective	OHN surgery	Care provider
Forbes55	2004	Canada	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Nizard56	2004	France	Learning curve analysis	Retrospective	Orthopaedics	Care provider
Harris57	2005	Canada	Quality control	Retrospective	Cardiovascular surgery	Centre
Mace58	2005	France	Quality control	Prospective	Cardiovascular surgery	Centre
Rogers59	2005	UK	Quality control	Retrospective	Cardiovascular surgery	Centre
Schuepfer60	2005	Belgium	Learning curve analysis	Retrospective	Anaesthesia	Centre
Sherlaw‐Johnson61	2005	UK	Quality control	Retrospective	Cardiovascular surgery	Centre
Song62	2005	Japan	Learning curve analysis	Retrospective	Cardiovascular surgery	Care provider
Tekkis63	2005	USA	Learning curve analysis	Retrospective	General surgery	Care provider
Tekkis64	2005	USA	Learning curve analysis	Retrospective	General surgery	Centre
Young65	2005	USA	Learning curve analysis	Prospective	Anaesthesia	Care provider

OHN, otolaryngology—head and neck.