3.9 Tree Aggregation File Parameters
The Tree Aggregation file is optional. This file must be specified if TreeScan analysis is requested. This file defines parameters necessary to execute a TreeScan analysis. Table 3.15 contains detailed specifications for this file.
| Parameter | Field Name | Description |
|---|---|---|
| TreeScan analytic dataset identifier | TREEANALYSISID | Corresponds to analytic dataset creation for individual TreeScan execution. |
| Note 1: one TREEANALYSISID is required for each unique combination of TREEANALYSISGRP and LEVELID for stratified analyses. | ||
| Format: SAS character $3 | ||
| Example: 001 | ||
| Label for the analytic dataset | TREEANALYSISGRP | Standardized name used to differentiate analytic datasets for use by TreeScan. |
| Note 1: TREEANALYSISGRP values must remain consistent during the course of a sequential surveillance activity. | ||
| Format: SAS character $40 | ||
| Example: Insulin_4_365 | ||
| Run identifier | RUNID | RunID assigned to the run that corresponds to the specified TREEANALYSISGRP. |
| Format: SAS character $5 | ||
| Example: r01 | ||
| Stratification identifier | LEVELID | Stratification variable identifying each unique combination of strata. Receives a unique level value that remains consistent across requests. Strata level variables must be requested in the distributed User-defined Strata Levels Look-up file. |
| Format: SAS character $3 | ||
| Example: 000 | ||
| Numeric identifier for stratification levels | LEVELNUM | Numeric identifier for the number of categories within a LEVELID. There needs to be 1 row for the number of categories within a LEVELID. For example, if LEVELID = 001 (age), and there are 2 age groups (0-65, 65+), then there should be 2 LEVELNUM assignments: LEVELNUM = 01 for LEVELNUMLBL = 0-65, and LEVELNUM = 02 for LEVELNUMLBL = 65+. |
| Note 1: if no stratification requested, (i.e., LEVELID = 000), then LEVELNUM should be left blank. | ||
| Format: SAS character $32 | ||
| Example: 01 | ||
| Label for stratification levels | LEVELNUMLBL | Label for the number of categories within a LEVELID. Within a given strata, this is exactly the text for a particular level as seen in the CIDA output files. For example, if LEVELID = 001 (age), and there are 2 age groups (0-65, 65+), then there should be 2 LEVELNUM assignments: LEVELNUM = 01 for LEVELNUMLBL = 0-65, and LEVELNUM = 02 for LEVELNUMLBL = 65+. |
| Note 1: if no stratification requested, (i.e., LEVELID = 000), then LEVELNUM should be left blank. | ||
| Note 2: when there are multiple stratification variables at the specified LEVELID, then the desired values in LEVELNUMLBL must align exactly with the order of variables in the distributed User-defined Strata Levels Look-up file. | ||
| Format: SAS character $32 | ||
| Example: 0-65 | ||
| Risk window start | RWSTART | Used to define the start of a user-defined fixed risk window when performing a Bernoulli TreeScan analysis with a self-controlled risk interval design (as opposed to a Tree-Temporal). |
| Note 1: only relevant for Type 3 analyses and is optional based on whether a fixed window analysis is being performed (as opposed to a variable window analysis with a temporal scan). | ||
| Note 2: must be set to missing for Type 2 analyses. | ||
| Note 3: TREEANALYSISGRP can be used for multiple sets of risk and control windows but each unique analysis requires its own TREEANALYSISID. | ||
| Note 4: control windows may precede or follow risk windows and the two windows are not required to be contiguous. | ||
| Note 5: this should be specified as a “timeline” label as opposed to an algebraic quantity, assuming Day 0 = 0. | ||
| Format: Numeric | ||
| Example: 1 | ||
| Risk window end | RWEND | Used to define the end of a user-defined fixed risk window when performing a Bernoulli TreeScan analysis with a self-controlled risk interval design (as opposed to a Tree-Temporal). |
| Note 1: only relevant for Type 3 analyses and is optional based on whether a fixed window analysis is being performed (as opposed to a variable window analysis with a temporal scan). | ||
| Note 2: must be set to missing for Type 2 analyses. | ||
| Note 3: TREEANALYSISGRP can be used for multiple sets of risk and control windows but each unique analysis requires its own TREEANALYSISID. | ||
| Note 4: control windows may precede or follow risk windows and the two windows are not required to be contiguous. | ||
| Note 5: this should be specified as a “timeline” label as opposed to an algebraic quantity, assuming Day 0 = 0. | ||
| Format: Numeric | ||
| Example: 28 | ||
| Control window start | CWSTART | Used to define the start of a user-defined fixed control window when performing a Bernoulli TreeScan analysis with a self-controlled risk interval design (as opposed to a Tree-Temporal). |
| Note 1: only relevant for Type 3 analyses and is optional based on whether a fixed window analysis is being performed (as opposed to a variable window analysis with a temporal scan). | ||
| Note 2: must be set to missing for Type 2 analyses. | ||
| Note 3: TREEANALYSISGRP can be used for multiple sets of risk and control windows but each unique analysis requires its own TREEANALYSISID. | ||
| Note 4: control windows may precede or follow risk windows and the two windows are not required to be contiguous. | ||
| Note 5: this should be specified as a “timeline” label as opposed to an algebraic quantity, assuming Day 0 = 0. | ||
| Format: Numeric | ||
| Example: -56 | ||
| Control window end | CWEND | Used to define the end of a user-defined fixed control window when performing a Bernoulli TreeScan analysis with a self-controlled risk interval design (as opposed to a Tree-Temporal). |
| Note 1: only relevant for Type 3 analyses and is optional based on whether a fixed window analysis is being performed (as opposed to a variable window analysis with a temporal scan). | ||
| Note 2: must be set to missing for Type 2 analyses. | ||
| Note 3: TREEANALYSISGRP can be used for multiple sets of risk and control windows but each unique analysis requires its own TREEANALYSISID. | ||
| Note 4: control windows may precede or follow risk windows and the two windows are not required to be contiguous. | ||
| Note 5: this should be specified as a “timeline” label as opposed to an algebraic quantity, assuming Day 0 = 0. | ||
| Format: Numeric | ||
| Example: -29 |