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Volume 9, Number 4—April 2003
Research

The Elderly and Waterborne Cryptosporidium Infection: Gastroenteritis Hospitalizations before and during the 1993 Milwaukee Outbreak

Elena N. Naumova*Comments to Author , Andrey I. Egorov*, Robert D. Morris*, and Jeffrey K. Griffiths*
Author affiliations: *Tufts University School of Medicine, Boston, Massachusetts, USA

Main Article

Table 3

Generalized Additive Mode estimates of excess daily rates of gastroenteritis-related emergency room visits and hospitalizations in the elderly in south and central water supply areas during the 1993 outbreak, Milwaukee, Wisconsina

Lag (d) 0.0–0.29 NTUb 0.3–0.49 NTU 0.5–0.99 NTU 1.0–2.0 NTU
0
0.57
0.57
0.56
0.56
1
0.40
0.50
0.72
1.20
2
0.27
0.37
0.58
1.12
3
0.37
0.46
0.64
1.10
4
0.33
0.54
0.94
1.64
5c
0.31
0.66
1.38
3.94
6c
0.22
0.59
1.33
4.10
7c
0.15
0.44
1.02
3.00
8
0.24
0.61
1.30
1.97
9
0.29
0.54
0.97
1.79
10
0.17
0.54
1.28
2.53
11
0.18
0.45
0.95
1.97
12
0.24
0.46
0.87
2.01
13c
0.21
0.58
1.29
2.68
14
0.09
0.49
1.23
2.38
15
0.22
0.48
0.97
1.80
16
0.37
0.52
0.76
1.61
17
0.34
0.50
0.78
1.05
18
0.38
0.44
0.52
1.03
Average daily
excess rate and standard deviation
0.28 (0.11)
0.51 (0.17)
0.95 (0.28)
1.97 (0.96)
Total excess rate for all lags 5.34 9.73 18.11 37.48

aPer 100,000 persons at 0–18 days lag postexposure at different levels of drinking water turbidity.
bNTU, Nephelometric Turbidity Units.
cLags in bold had statistically significant regression slopes (p <0.05).

Main Article

Page created: December 08, 2010
Page updated: December 08, 2010
Page reviewed: December 08, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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