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Table 3 Capture–recapture analysis of all hepatitis A cases and of subgroups, Catalonia 2011 to 2015

From: Hepatitis A surveillance: sensitivity of two information sources

  No. records in SDR No. records in MRS Matched records Calculated unreported cases Estimated total no. of cases (95% CI) SDR Sensitivity (%)
(95% CI)
MRS Sensitivity (%)
(95% CI)
Difference in sensitivity of the two sources p-value
All cases 547 216 105 463 1121 (985–1258) 48.8 (43.5–55.6) 19.3 (17.2–21.9) 29.5% < 0.001
Age at notification, years
 < 15 years 302 99 76 68 393 (357–430) 76.6 (72.7–81.0) 25.2 (20.9–29.5) 51.4% < 0.001
 > = 15 years 245 116 29 627 959 (687–1232) 25.5 (22.8–28.3) 12.1 (10.0–14.2) 13.4%
Sex 0.667
 Male 308 126 58 288 664 (554–775) 46.4 (39.8–55.7) 19.0 (16.3–22.8) 27.4%
 Female 239 90 47 172 454 (376–533) 52.6 (44.9–63.6) 19.8 (16.9–24.0) 32.8%
Year of declaration
 Year 2011 134 18 9 155 268 (168–369) 50.0 (36.4–79.9) 6.7 (4.9–10.7) 43.3% Ref
 Year 2012 127 50 34 44 187 (158–216) 68.0 (58.8–80.6) 26.8 (23.2–31.7) 41.2% < 0.001
 Year 2013 107 31 21 41 158 (126–190) 67.7 (56.3–85.5) 19.6 (16.3–24.6) 48.1% 0.005
 Year 2014 101 62 22 144 285 (207–364) 35.5 (27.8–48.9) 21.8 (17.1–30.1) 13.7% 0.015
 Year 2015 74 55 19 104 214 (153–276) 34.6 (26.8–48.5) 25.7 (19.9–36.1) 8.9% 0.008
Size of municipality 0.070
 < 10,000 people 115 75 33 102 259 (205–312) 44.5 (38.5–50.6) 29.0 (23.5–34.6) 15.5%
 > =10,000 people 430 127 72 270 755 (652–858) 57.0 (53.5–60.5) 16.8 (14.2–19.5) 40.2%
Country of birth < 0.001
 Spain 186 88 50 101 325 (376–375) 57.2 (49.6–67.4) 27.1 (23.5–31.9) 30.1%
 Other countries 92 78 45 34 159 (138–180) 58.0 (51.2–66.8) 49.1 (43.4–56.6) 8.9%
Type of notification < 0.001
 Electronic 184 37 17 186 390 (269–511) 47.2 (36.0–68.5) 9.5 (7.3–13.8) 37.8%
 Paper 363 179 88 281 735 (642–830) 49.4 (43.8–56.6) 24.4 (21.6–27.9) 15.8%
Centre of notification 0.704
 Primary health care centre 184 65 29 186 406 (310–503) 45.3 (36.6–59.5) 16.0 (12.9–21.0) 45.1%
 Hospital 182 151 76 103 360 (318–404) 50.5 (45.2–57.3) 41.9 (37.5–47.6) 5.6%