Cross-validation of an algorithm detecting acute gastroenteritis episodes from prescribed drug dispensing data in France: comparison with clinical data reported in a primary care surveillance system, winter seasons 2014/15 to 2016/17

Table 2 Pearson’s correlations and weekly rates of the number of acute gastroenteritis episodes estimated from drug dispensing data with respect to the number of acute gastroenteritis episodes estimated from Sentinelles data, winter seasons 2014/15 to 2016/17 (week number 36 of year N to week number 15 of year N + 1)

Season	Age groups (years)	Correlation coefficient^a [95% CI]	Median weekly rates (%) [1st, 3rd quartiles]
2014/15^b	All ages	0.84 [0.69; 0.92]	44 [38; 47]
2015/16	All ages	0.87 [0.75; 0.93]	44 [43; 49]
	0–4	0.75 [0.54; 0.87]	43 [39; 45]
	5–14	0.80 [0.63; 0.90]	49 [45; 52]
	15–64	0.87 [0.75; 0.93]	37 [35; 39]
	65+	0.75 [0.55; 0.87]	68 [60; 76]
2016/17	All ages	0.94 [0.88; 0.97]	45 [39; 48]
	0–4	0.91 [0.82; 0.95]	44 [40; 47]
	5–14	0.90 [0.81; 0.95]	52 [44; 57]
	15–64	0.92 [0.84; 0.96]	37 [34; 40]
	65+	0.87 [0.75; 0.93]	64 [58; 76]

^a Correlation are computed at no time lag between the weekly acute gastroenteritis incidences estimated using the discrimination algorithm applied on drug dispensing data available in the LTD database and the weekly acute gastroenteritis incidences estimated at the Sentinelles Network
^b Due to limitations of the drug dispensing database, the analysis at age group level could not be carried out for season 2014/15

ISSN: 1471-2288