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Table 1 Standardized mortality ratios (SMR) during the period 1997–2003 among 45,640 Swedish reported cases of campylobacteriosis, infected in Sweden (n = 16,710) and abroad (n = 28,930)

From: Mortality following Campylobacter infection: a registry-based linkage study

 

Infected in Sweden

Infected abroad

Time after infection (months)

Obs* (n = 563)

Exp*

SMR* (95% CI*)

Obs (n = 222)

Exp

SMR (95% CI)

0–1

30

10.4

2.9 (1.9–4.0)

2

6.8

0.3 (0.04–0.8)

1–3

31

20.7

1.5 (1.0–2.1)

10

13.7

0.7 (0.4–1.3)

3–12

123

93.9

1.3 (1.1–1.6)

28

63.3

0.4 (0.3–0.6)

>12

379

388.6

1.0 (0.9–1.1)

182

330.6

0.6 (0.5–0.6)

  1. * Obs, observed number of deaths; Exp, expected number of deaths; SMR, standardized mortality ratio; CI, confidence interval