. 2012 Feb 3;12:e9.

Table 2.

Studies focusing on donor site morbidity after transplantation of a free radial forearm flap^a

Level of evidence	Literature
I) Ia)	None
Ib)	⁹^,¹⁰^,¹⁴
II) IIa)	None
IIb)	¹¹^,³⁹^,⁴¹^,⁵⁴^,⁶⁹^,⁷⁰^,⁷²^,⁷⁶
IIc)	¹⁵^,²⁴^,³⁰^,⁴⁰^,⁴⁷^,⁴⁸^,⁵⁵^,⁵⁸^,⁵⁹^,⁶³^-⁶⁷^,⁷¹^,⁷³^,⁷⁴^,⁷⁷^-⁸⁰
III) IIIa)	None
IIIb)	⁴⁴^,⁸¹^,⁸²
IV)	¹²^,¹³^,¹⁶^-²³^,²⁵^,²⁶^,²⁸^,²⁹^,³¹^-³⁸^,⁴²^,⁴³^,⁴⁵^,⁴⁶^,⁴⁹^-⁵³^,⁵⁶^,⁵⁷^,⁶⁰^-⁶²^,⁶⁸^,⁷⁵^,⁸³^-¹⁶⁶
IVa (number of participants >100)	n = 8
IVb (number of participants 20-100)	n = 43
IVc (number of participants <20)	n = 71
V)	²⁷^,¹⁶⁷^-¹⁸⁰
(VI)	¹⁸¹^-²¹⁵

^a PubMed research 2011-10-05; key words: “donor site morbidity” and “radial forearm flap,” results: n = 188 plus articles (n = 18) found during research that were not identified by the database search: n = 206). Classification of the articles according to their levels of evidence. Classified as Evidence Levels I to VI as shown in Table 1.