Table 4. Number of dengue cases estimated from mandatory notification and laboratory network surveillance systems with Chao estimator after stratification according to geographic area and period of the year, metropolitan France, in 2010 and for 2007–2010*.

Stratification type, Y	No. observed cases			Estimated total no. cases (95% CI)	Completeness of MN, % (95% CI)	Completeness of LN, % (95% CI)	Combined completeness, % (95% CI)
	With MN	With LN	Common cases
Geographic stratification 2010
Southeast	97	229	80	332 (302–378)	29.2 (25.0–32.5)	69.0 (59.0–76.8)	74.1 (63.4–82.5)
Other areas	488	1,896	349	4,071 (3,791–4,396)	12.0 (11.1–12.9)	46.6 (43.1–50.0)	50.0 (46.2–53.8)
Total	585	2,125	429	4,403 (4,120–4,730)	13.3 (12.3–14.2)	48.3 (44.8–51.6)	51.8 (48.1–55.4)
2007–2010
Southeast	113	320	93	558 (475–691)	20.3 (16.3–23.8)	57.3 (46.3–67.3)	60.9 (49.2–71.5)
Other areas	660	2,847	449	7,684 (6,896–8,632)	8.6 (7.6–9.6)	37.1 (32.9–41.2)	39.8 (35.3–44.3)
Total	773	3,167	542	8,242 (7,446–9,194)	9.4 (8.4–10.4)	38.4 (34.4–42.5)	41.2 (37.0–45.6)
Period stratification
2010
May–Nov†	524	1,694	386	3,186 (2,994–3,410)	16.4 (15.3–17.5)	53.2 (49.6–56.6)	57.5 (53.6–61.3)
Remainder of year	61	431	43	1,407 (1,118–1,821)	4.3 (3.2–5.6)	30.6 (22.9–39.6)	31.9 (23.8–41.2)
Total	585	2,125	429	4,594 (4,223–5,034)	12.7 (11.4–13.9)	46.3 (41.5–50.4)	49.7 (44.6–54.1)
2007–2010
May–Nov	656	2,325	468	5,263 (4,764–5,873)	12.5 (11.4–13.9)	44.2 (39.6–48.8)	47.7 (42.8–52.8)
Remainder of year	117	865	74	3,416 (2,761–4,303)	3.4 (2.7–4.2)	25.3 (20.1–31.3)	26.6 (21.1–32.9)
Total	773	3,190	542	8,679 (7,817–9,709)	8.9 (8.0–9.9)	36.8 (32.9–40.8)	39.4 (35.2–43.8)
*MN, mandatory notification; LN, laboratory network; information on geographic area or period of the year was not available for 27 cases. Southeast includes the departments (administrative regions) where the competent vector, the Aedes albopictus mosquito, was established. †May–Nov is the period of activity of Ae. albopictus mosquitoes in metropolitan France.