Table 2 The ORBIT classification system for missing or incomplete outcome reporting [10].
From: Assessing the potential for outcome reporting bias in a review: a tutorial
Classification | Description | Level of reporting | Level of suspicion of ORB |
|---|---|---|---|
Clear that the outcome was measured and analysed | |||
A | States outcome analysed but only reported that result not significant (typically stating p-value > 0.05). | Partial | High risk |
B | States outcome analysed but only reported that result significant (typically stating p-value < 0.05). | Partial | Low risk |
C | States outcome analysed but insufficient data presented to be included in meta-analysis or to be considered to be fully tabulated. | Partial | Low risk |
D | States outcome analysed but no results reported. | None | High risk |
Clear that the outcome was measured | |||
E | Clear that outcome was measured but not necessarily analysed. | None | High risk |
F | Clear that outcome was measured but not necessarily analysed. | None | Low risk |
Unclear that the outcome was measured | |||
G | Not mentioned but clinical judgment says likely to have been measured and analysed. | None | High risk |
H | Not mentioned but clinical judgment says unlikely to have been measured. | None | Low risk |
Clear that the outcome was NOT measured | |||
I | Clear that outcome was not measured. | N/A | No risk |