Volume 20, Number 4—April 2014
Large Outbreak of Cryptosporidium hominis Infection Transmitted through the Public Water Supply, Sweden
||Duration,‡ p value
|Adjusted OR (95% CI)
|Age, continuous||0.99 (0.98–0.99)||<0.0001||<0.0001|
|Chronic intestinal disease§||1.86 (0.95–2.63)||0.08||<0.01|
|Chronic underlying disease#||1.15 (0.73–1.8)||0.55||0.59|
|Gluten intolerance||4.06 (1.24–13.29)||0.02||0.05|
|Lactose intolerance||1.40 (0.79–2.46)||0.25||<0.01|
|No. additional family members with cryptosporidiosis||1.99 (1.70–2.33)||<0.0001||NA|
|No. glasses of water consumed daily||1.07 (1.03–1.11)||<0.0001||0.07|
|No. persons in household||0.98 (0.87–1.07)||0.54||NA|
|Peptic ulcer or medication||1.26 (0.72–2.22)||0.42||0.43|
*OR, odds ratio, adjusted for age, sex, and residence in the water treatment plant area; NA, not applicable.
†Participants with watery diarrhea and/or >3 episodes of diarrhea daily were defined as having cryptosporidiosis.
‡Duration (i.e., time fulfilling the case definition).
§Defined as inflammatory bowel disease, lactose intolerance, or gluten intolerance.
#Defined as cancer, rheumatic disease, cardiac failure, asthma, chronic obstructive pulmonary disease, or diabetes.