Table A2 Results of quality assessment of diagnostic accuracy studies (QUADAS) tool.

QUADAS criteria	No of studies fulfilling criteria
Representative sample	19/29
Selection criteria clearly described	28/29
Reference test appropriate	29/29
Short time between reference test and index test	29/29
Verification of diagnosis	29/29
Verification with same reference test	29/29
Reference and index test independence	29/29
Reference test replication	29/29
Index test blind	29/29
Data same as in clinical practice	29/29
Uninterpretable/intermediate results reported	26/29
Withdrawals explained	28/29