Table A.1.
Data extraction checklist.
| Feature extracted | Description |
|---|---|
| Article Extraction Checklist | |
| Identification number | Identification number for study |
| Journal name | The journal that the study was published in |
| Journal impact factor | The journal impact factor |
| Substantive policy domain | The substantive domain of the policy |
| Study design or causal identification strategy | The analytical study design for causal identification (e.g., instrumental variable or difference-in-differences) |
| Years of social policy intervention | The relevant years for the policy intervention |
| Sample size | The sample size in the study |
| Heterogeneous treatment effect (HTE) Extraction Checklist | |
| Outcome | The relevant outcome for HTE estimate |
| Outcome variable type | The type of measure of the outcome (e.g., binary or continuous) |
| HTE assessed | A dummy indicator of whether a study assessed HTEs |
| Intent to assess HTE specified a priori | A dummy indicator of whether a study specified the HTE analysis a priori |
| HTE supported by theory | A dummy indicator of whether the choice of HTE analyses supported by theory |
| HTE method | Specification of method for assessing HTE, if applicable |
| Subgroups for HTE estimate | What groups were specified to test HTE |
| HTE estimates | Estimate of HTE by group |
| Subgroup sample sizes | Sample size of subgroup in HTE analysis |
| Standard error HTE estimates | The standard error of HTE estimate |
| Confidence interval (CI) HTE estimates | The CI for HTE estimates |
| Statistical significance of HTE estimates | A dummy indicator for whether HTE estimate statistically significant |
| p-value | The p-value for HTE estimate |
| Effect measure (measure of association) | The effect measure or measure of association of HTE estimate (e.g., relative risk, odds ratio, or standardized mean difference) |