Table IV.

Example 4: The seven exposure groupings used

Group	Description
Baseline	No known history of diabetes. Fasting glucose 3.9–5.6 mmol/L
A	No known history of diabetes. Fasting glucose less than 3.9 mmol/L
B	No known history of diabetes. Fasting glucose 5.6–6.1 mmol/L
C	No known history of diabetes. Fasting glucose 6.1–7 mmol/L
D	No known history of diabetes. Fasting glucose greater than 7 mmol/L
E	Known history of diabetes. Fasting glucose less than 7 mmol/L
F	Known history of diabetes. Fasting glucose more than 7 mmol/L

Thirty-nine studies, with 11 or more cardiovascular disease events, provide all the six estimates of the log hazard ratio of groups A–F, relative to the baseline group, and all corresponding within-study variances and correlations.