Jeu de données : Données hospitalières relatives à l'épidémie de COVID-19
Titre : Reporting delay
Date : 2020-05-22 11:59

Hello, is there any information on reporting delay? In other words, if 100 new deaths get reported today, what fraction of those deaths have, on average, occurred yesterday / 2 days ago / 3 or more days ago? Approximate estimates would be very helpful.
(traduit automatiquement)
Bonjour, y a-t-il des informations sur les retards de notification ? En d'autres termes, si 100 nouveaux décès sont signalés aujourd'hui, quelle est la proportion de ces décès qui, en moyenne, sont survenus hier / il y a 2 jours / il y a 3 jours ou plus ? Des estimations approximatives seraient très utiles.
Bonjour,

Les données fournies le sont sur les 24 dernières heures arrêtées à 14h CEST (Paris TZ)
Autrement dit : si dans les fichiers il y a marqué 17870 (+58) décès, cela signifie qu'hier à 14h (chiffres du jour non encore publiés) il y avait eu 17870 décès recensés pour raison de covid-19 depuis que la France remonte ces informations et qu'avant-hier il y avait eu 17812 décès (17870-58)
Il n'y a pas de retard. Par contre il y a parfois du rattrapage : si jamais quelqu'un était marqué covid-19 le 15 Mai, cette personne peut avoir été retirée le 19 Mai.
Et il y a un bémol : les DOM-TOM (territoires d'Outre-Mer) qui ont parfois eu au début un certain 'retard'.
Merci beaucoup pour cette réponse rapide ! Je comprends que la statistique compte correctement tous les rapports au cours des dernières 24 heures, mais les rapports comptent-ils correctement tous les décès au cours des dernières 24 heures ?
Que se passe-t-il si une personne est déjà morte, mais que son infection est confirmée plus tard, par exemple lors d'une autopsie ? Comment apparaîtrait-elle dans les statistiques ?
Deuxième point : comment expliquer le taux plus faible de décès déclarés le week-end ? L'explication la plus probable, si vous regardez les données d'autres pays : certains décès survenus pendant le week-end ne sont déclarés que le lundi, ou plus tard. Quelqu'un a-t-il quantifié ce retard dans les données de la SpF ?
oui pardon j'ai oublié le cas particulier des week-end que je n'ai pas compté comme retards ...c'est parce que certains 'services' ne travaillent pas le week-end. Donc certaines données sont effectivement transmises avec 'retard'
@ Benjamin,
Hi,
There is absolutely no information about the real date of any event reported as all data in the daily situation is only based on its reported/consolidation date. One could have happened during the last 24 hrs or at anytime since the begining of the crisis while just implemented/modified into the database.

This is one of the major flaws of this reporting system. The other one is that each daily situation is taking into account a lot of non consolidated data (the late ones), then subject to change from one day to the next without any information about the change made from one report to the next.

Hence, data history is not coherent and just can't be classified by real date of events.
Thank you, that would be unfortunate. Are there no estimates or best guesses for either of the following?

(a) how many of today's increases are actually from the last 24h/48h? 
(b) if someone dies in a hospital today (before the cutoff time), what is their chance of showing up in the statistic tomorrow?
(c) what fraction of people are diagnosed after death?

For example this could be obtained from workers at the hospitals, who enter the information. Certainly there must be constraints. How else can we know that people are still dying at all, and hat the increases are not just due to a very long delay?

@Olivier and @ Denis: how can I reconcile your different opinions?
As an example, lets take the last published data (until the one later tonight).

On 21 May, one can find in the file "donnees-hospitalieres-covid19..." those fields:
Total for France (101 departements)
. the balance of people still hospitalized for Covid-19 ("hosp"): 17,527
. the cumulated total of people discharged from hospital ("rad"): 63,849
- the cumulated total of people who died in hospital ("dc"): 17,851

The sum of those three fields is the cumulated number of people having being hospitalized for Covid-19 in French hospitals so far: 
- 21 May: 99,227
- the day before, 20 May, it was: 99,020

The difference between both is the balance of people being newly admited during the last 24 hrs
- 21 May: 207

Now, there is another file called "donnees-hospitalieres-nouveaux-covid19..." which field "hosp" is just giving the number, by department, of newly hospitalized people for Covid-19; if one make the sum of this field for the 21 May, the total is not 207 but 271.

Why?
Because all those 271 people are still subject to further revision (pending test results, etc.). Hence, what the difference between 207 and 271 is showing is that 64 people have been removed from the database between the 20 and 21 May situations. Which mean that yesterday, the published situation was actually in excess of 64 people... but we still have no information when (on which exact day) any those "excess" people have been added either.
ce n'est pas mon opinion : c'est l'opinion de mon administration : quand M. le Pr Jérôme SALOMON dit que ce sont les chiffres du jour (nombre hospitalisations ce jour, nombre de réa ce jour, nombre de personnes retournées chez elle à ce jour et nombre de décès référencés à ce jour, etc.), j'ose espérer qu'il sait de quoi il parle.
Lui, le Président de la République, le 1e Ministre, le Ministre de la Santé ...
@ Denis
Daily Situation "as reported each day at 14h00, pending later "consolidation" and that the number of hospital reporting is not the same every day" (some are reporting very fast, others are slower, etc.).
A few follow-up questions:

(1) Is the "nouveaux" file being edited retrospectively to account for the updated information? In other words, does – in addition to the most recent day – any older data change between file updates?

(2) Is there a person in France who knows what the delay is, whom we could ask, or is the information lost due to the way it is transmitted?

(3) what would be the reason for "slow" transmission (except for weekends). Is it all done online, by phone or even by mail?
(1) "nouveaux" (incid) is edtited at the same time ; the file history is updated for minor changes (mostly transfers from one department to another)
(2) anyone with a full access to the SI-VIC database could edit fully detailed stats ; but, those access levels are very sensible matter for personal data protection.
(3) The SI-VIC database was adapted to Covid-19 from other intended use and many people weren't familiar with it at first ; hence, difficulties in the run up.
I'll be back later for further questions.
Regarding point (3) and the SI-VIC database: what is the chain of people / institutions that leads from the SI-VIC database to this webpage? Can we go backwards and ask for a dataset where deaths are listed by date of death?

Annotation : Questions ou remarques d'usagers (Autre)