Table 5

Crude, directly standardized, and adjusted annual incidence risk of ME/CFS

GP Practices

ME/CFS cases (n)

Population

18 - 64 years old

Crude annual incidence risk (‰)

Standardized annual incidence riska (‰)

Annual incidence risk corrected response ratesb (‰)


T

M

F

T

(95% CI)

M

(95% CI)

F

(95% CI)

T

M

F


All practices

13

143,153

0.09

0.04

0.14

0.09

0.05 - 0.15

0.04

0.01 - 0.11

0.13

0.06 - 0.24

0.15

0.06

0.41

London

4

33,047

0.12

0.12

0.13

0.12

0.03 - 0.31

0.10

0.01 - 0.37

0.12

0.01 - 0.43

0.33

0.27

0.31

East Anglia

7

28,026

0.25

0.07

0.44

0.24

0.10 - 0.50

0.07

0 - 0.39

0.38

0.14 - 0.83

0.24

0.07

0.38

East Yorkshire

2

82,080

0.02

0.05

0.02

0 - 0.09

0.05

0.01 - 0.16

0.02

0.05


aReference population: England mid-2008 population (source: Office for National Statistics - http://www.statistics.gov.uk/statbase/product.asp?vlnk = 15106 webcite);

bAssumption: The respondents and non-respondents have proportionally the same number of ME/CFS cases; T, Total; M, male; F, female; based on 29 GP clinics.

Nacul et al. BMC Medicine 2011 9:91   doi:10.1186/1741-7015-9-91

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