# Tag Info

2

The K&H method can also lead to a reduction in the SE. This happens when the outcomes are unusually homogeneous. Note that the Q-statistic is way below its degrees of freedom here (the expected value of Q under the null hypothesis of homogeneity is equal to its dfs), which indicates that this is such a case. When this happens, the correction factor that ...

2

Unfortunately there is no way that I know of to convert hazard ratios (HR) to risk differences (RD). One issue is a basic difference between the measures. HR under the proportional hazards assumption describe the HR over the whole follow-up period. RD is instead defined by the follow-up time (i.e. it can be time-varying). As a simple thought-experiment, ...

1

I am afraid the article is quite unreadable here as much of my screen is taken up by a girl waving at me so my answer is based on general principles. If the studies fall into sub-groups then you can look at heterogeneity within sub-groups. This may be less than overall heterogeneity if the sub-groups differ. The amount of heterogeneity may differ between sub-...

Only top voted, non community-wiki answers of a minimum length are eligible