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. 2013 Dec 2;8(12):e82259. doi: 10.1371/journal.pone.0082259

Table 2. Demographic characteristics of febrile patients with serologic evidence of acute or past chikungunya infection vs. no serologic evidence of chikungunya, Southern Sri Lanka, 2007 * .

Demographic Characteristics Chikungunya (n=40) No chikungunya (n=757) P value
Age in years, median (IQR) 41.6 (27.8-51.8) 30.3 (18.5-47.7) 0.01
Male 80.0 59.7 0.01
Residence 0.03
Rural 82.5 92.1
Urban 17.5 7.9
Type of Work 0.01
Home 23.1 26.9
Laborer 28.2 25.3
Farmer, e.g. rice paddy 2.6 2.7
Merchant 10.3 2.7
Student 5.1 23.1
Other 30.8 19.3
Swim/Bathe/Wade 0.93
None 76.9 74.2
River 10.3 13.0
Paddy Field 10.3 10.2
Pond/Lake 0 1.1
Other 2.6 1.6
Water Source 0.05
Tap 50.0 29.5
Boiled 7.5 9.6
Well 42.5 60.3
Other 0.0 0.7
*

Except for median age, data are percentages. IQR, intraquartile range

Kruskal-Wallis test to compare proportions across groups.