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Table 2 Comparison of school-based with clinic-based indicators

From: Teacher led school-based surveillance can allow accurate tracking of emerging infectious diseases - evidence from serial cross-sectional surveys of febrile respiratory illness during the H1N1 2009 influenza pandemic in Singapore

Summary measure

School type

Clinic-based indicators†

School-based indicators, per 100 school children‡

  

GP-ILI

GP* Lab-ILI

Sch-LCC

Sch-FRI

Sch-FRI-adj

Cumulative incidence in entire period

Pri

34

21

0.24

32

25

 

Sec

19

13

0.25

36

25

Cumulative incidence up to week 30

Pri

17

10

0.15

15

13

 

Sec

10

6.9

0.20

19

15

Fraction of cumulative incidence occurring up to week 30

Pri

50%

49%

63%

48%

51%

 

Sec

52%

52%

79%

53%

61%

  1. All data has been rounded off to 2 significant figures.
  2. †Incidence data for GP-ILI is expressed as the number of ILI consults per GP per week, while that for GP*Lab-ILI is the number of ILI consults per GP per week attributable to pdmH1N1, as derived by multiplying GP-ILI with the weekly proportion of ILI samples positive for pdmH1N1.
  3. ‡Sch-LCC is based on notifications of laboratory confirmed cases of pdmH1N1 by all schools, Sch-FRI is self-reported febrile respiratory illness in the 6 sentinel schools, and Sch-FRI-adj is Sch-FRI adjusted to remove possible contribution from non-pdmH1N1 causes using FRI incidence from week 38 as a proxy for baseline incidence.