diff --git a/docs/api/covidcast-signals/nhsn.md b/docs/api/covidcast-signals/nhsn.md index 8296d0cb1..de570ce33 100644 --- a/docs/api/covidcast-signals/nhsn.md +++ b/docs/api/covidcast-signals/nhsn.md @@ -25,7 +25,8 @@ Each signal below is derived from one of two following datasets: - Main: [Weekly Hospital Respiratory Data (HRD) Metrics by Jurisdiction, National Healthcare Safety Network (NHSN)](https://data.cdc.gov/Public-Health-Surveillance/Weekly-Hospital-Respiratory-Data-HRD-Metrics-by-Ju/ua7e-t2fy/about_data) - Preliminary: [Weekly Hospital Respiratory Data (HRD) Metrics by Jurisdiction, National Healthcare Safety Network (NHSN) (Preliminary)](https://data.cdc.gov/Public-Health-Surveillance/Weekly-Hospital-Respiratory-Data-HRD-Metrics-by-Ju/mpgq-jmmr/about_data). Signals derived from the preliminary dataset have suffix `_prelim` in their signal names. -Both datasets started reporting data in late 2022. As of May 2024, NHSN received data from 78% of US EDs. +Both datasets started reporting data in late 2022. +As of May 2024, NHSN received data from 78% of US EDs. State and nation-level values are pulled directly from the source; HHS-level values are aggregated up from the state level. @@ -45,7 +46,8 @@ State and nation-level values are pulled directly from the source; HHS-level val ## Estimation -All data is weekly such that each reported value represents a total from Sunday to Saturday of the reference week. The `output_signal_name` signal mirrors the `input signal name` field for all geographic resolutions except HHS. +All data is weekly such that each reported value represents a total from Sunday to Saturday of the reference week. +The `output_signal_name` signal mirrors the `input signal name` field for all geographic resolutions except HHS. ### Geographic weighting @@ -78,7 +80,8 @@ Standard errors and sample sizes are not applicable to these metrics. ## Lag and Backfill -The signals are currently updated weekly, generally on Friday. Each report adds data for the week prior. +The signals are currently updated weekly, generally on Friday. +Each report adds data for the week prior. For example, on Friday, 2024-04-19, the source added new data representing hospitalizations from the week ending 2024-04-13. This results in a reporting lag of 6 days from the end of the reference week.