Passive Ultrasonic Irrigation Efficacy in the Vapor Lock Removal: Systematic Review and Meta-Analysis
Table 2
Application of the Newcastle-Ottawa scale for case-control studies in order to evaluate the Risk of Bias between the three studies selected for the present systematic review.
SELECTION
Castelo-Baz P et al., 2012
Castelo-Baz P et al., 2016
Sáinz-Pardo M et al., 2014
(1) Is the case definition adequate?
(a) yes, with independent validation
A
A
A
(b) yes, e.g. record linkage or based on self reports
(c) no description
(2) Representativeness of the cases
A
A
B
(a) consecutive or obviously representative series
of cases
(b) potential for selection biases or not stated
(3) Selection of Controls
B
B
B
(a) community controls
(b) hospital controls
(c) no description
(4) Definition of Controls
B
B
B
(a) no history of disease (endpoint)
(b) no description of source
COMPARABILITY
(1) Comparability of cases and controls on the basis of the design or analysis
A
A
A
(a) study controls for vapor lock removal
(b) study controls for any additional factor(This criteria could be modified to indicate specific control for a second important factor.)
EXPOSURE
(1) Ascertainment of exposure
(a) secure record (e.g. surgical records)
E
E
E
(b) structured interview where blind to
case/control status
(c) interview not blinded to case/control status
(d) written self-report or medical record only
(e) no description
(2) Same method of ascertainment for cases and controls
