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Table 1 Characteristics of possible outbreaks by ship class in the 5th fleet during October 2000 – September 2001

From: Epidemic infectious gastrointestinal illness aboard U.S. Navy ships deployed to the Middle East during peacetime operations – 2000–2001

Ship Type

Average shipboard population

nships

Ship weeks

npossible outbreaks

Mean duration (weeks)1

Cumulative attack risk (%)

Ship Type AR2 (per 100 ship-weeks)

Carrier

4951

5

45

3

2.7

3.3

6.7

Amphibious assault

669

7

56

2

5.0

7.5

3.5

Cruiser

384

6

50

0

na

na

na

Destroyer

321

18

120

5

5.4

3.8

4.2

Combat Support

551

3

22

1

(3.0)

(1.6)

4.5

Frigate

237

5

38

0

na

na

na

  1. 1. calculation based on only those ships within the class with outbreaks
  2. 2. Rate of possible outbreaks per ship-week of observation time
  3. na = not applicable