DADelhi Air Health
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Research outputs

Research outputs and project records.

Completed outputs are listed separately from planned ones. Registration, DOI and manuscript links appear only after they actually exist.

Study protocol

Frozen

Protocol v1.1.1

The current internal protocol specifies the primary estimand, study window, completeness rules, QC, missingness, bootstrap procedure and sensitivity analyses before the primary period begins.

DAH-PM25-2026-27-v1-1-1 · frozen 8 Sept 2026

Open protocol →

External registration

Prepared · not submitted

OSF Preregistration

The OSF registration is being prepared from the frozen external-registration copy. It is not yet described as registered.

Public registration planned before the primary study period

Research data

1 frozen release

DAH-2026-09-07-r1

Named releases freeze the station roster, normalized snapshots, monitor-hour table, provenance and QC state so a later analysis can refer to a stable dataset boundary.

1,632 monitor-hours · 67 physical sites

Open data releases →

Software

Versioned

Delhi Air Health v2.18.0

The application, data pipeline and research code are versioned separately from frozen datasets. A public archival software DOI will be added when the repository release is connected to an archival service.

Software DOI: not yet assigned

Dataset DOI

Planned

Primary-study dataset

A DOI-bearing dataset package is planned after the primary study window, with a data dictionary, station registry, QC ledger, provenance, weather covariates and reproducibility files.

DOI: not yet assigned

Manuscript

Planned

Primary study report

The primary manuscript will report the prespecified network-relative site contrasts after the primary study period. No manuscript or preprint is presented as complete at this stage.

Primary window ends 31 Mar 2027

Evidence chain

From protocol to report

1

Protocol

Defines the analysis before the primary data period.

2

Archive

Collects hourly source data with provenance and explicit missingness.

3

Frozen releases

Create stable data boundaries with checksums.

4

Analysis

Applies the prespecified rules to eligible primary-period observations.

5

Report

Cites the protocol, release and software used for the published result.

Current study identity

Persistent site-level contrasts in hourly PM2.5 across Delhi-NCR relative to the concurrent network median: a prospective observational study

DAH-PM25-2026-27-v1-1-1
SHA-256 22076bd8e22dba94f8f6ca11bb66f0ac09fe4e9dc6801a1a6ebd76682835672a

ProtocolMethodsResearch operations