| Name of study |
None |
| Inclusion criteria |
Programme on primary prevention of diabetes in the population and in high risk people (positive family history of diabetes); individuals with at least 2 follow‐up visits; participants were given advice on preventive measures such as dietary modifications and regular exercise |
| Exclusion criteria |
Known history of diabetes, newly diagnosed diabetes during screening |
| Notes |
Baseline data for IGT group (N = 619); participants were given advice on preventive measures such as dietary modifications and regular exercise |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Study participation: description of source population or population of interest |
Low risk |
Yes |
| Study participation: description of glycaemic status at baseline |
Low risk |
Yes |
| Study participation: adequate description of sampling frame & recruitment |
Unclear risk |
Scarce data |
| Study participation: adequate description of period & recruitment place |
Unclear risk |
Scarce data |
| Study participation: adequate description of inclusion & exclusion criteria |
Low risk |
Inclusion and exclusion criteria described |
| Study attrition: description of attempts to collect information on participants who dropped out |
Unclear risk |
Not reported |
| Study attrition: reasons for loss to follow‐up provided |
Unclear risk |
Not reported |
| Study attrition: adequate description of participants lost to follow‐up |
Unclear risk |
Not reported |
| Study attrition: no important differences between participants who completed the study and those who did not |
Unclear risk |
Not reported |
| Glycaemic status measurement: provision of clear definition or description of glycaemic status |
Low risk |
Yes |
| Glycaemic status measurement: valid and reliable method of glycaemic status measurement |
Low risk |
Yes |
| Glycaemic status measurement: continuous variables reported or appropriate cut points used |
Low risk |
IGT: 2‐h PG 7.8 to < 11.1 |
| Glycaemic status measurement: same method and setting of measurement of the glycaemic status for all study participants |
Low risk |
Yes |
| Outcome measurement: clear definition of the outcome provided |
Unclear risk |
Not defined, presumably by OGTT |
| Outcome measurement: method of outcome measurement used valid & reliable |
Unclear risk |
Scarce data |
| Outcome measurement: same method & setting of outcome measurement for all study participants |
Unclear risk |
Scarce data |
| Study confounding: important confounders measured |
Unclear risk |
Some covariates measured (see Appendix 16 and Appendix 17) |
| Study confounding: clear definitions of important confounders provided |
Unclear risk |
Not reported |
| Study confounding: measurement of confounders valid & reliable |
Unclear risk |
Not reported |
| Study confounding: same method & setting for measurements of confounders for all study participants |
Low risk |
Yes |
| Study confounding: appropriate methods used if missing confounder data imputed |
Unclear risk |
Not reported |
| Study confounding: important potential confounders accounted for in study design |
Unclear risk |
Some covariates included (see Appendix 16 and Appendix 17) |
| Study confounding: important potential confounders accounted for in the analysis |
Unclear risk |
Some covariates analysed (see Appendix 16 and Appendix 17) |
| Statistical analysis & reporting: sufficient presentation of data to assess adequacy of the analytic strategy |
Low risk |
Cumulative incidence, odds ratio |
| Statistical analysis & reporting: the statistical model is adequate for the design of the study |
Low risk |
Multiple logistic regression, Cox regression analysis |
