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. 2015 Nov 5;21:45. doi: 10.1186/s40409-015-0045-4

Table 3.

Difference among age groups as to symptoms

Symptoms Mild Moderate Severe Total
Age groups (year) frequency (%) frequency (%) frequency (%) frequency (%)
<10 89 (8.3) 2 (9.5) 3 (4.9) 94 (8.2)
10–19 168 (15.7) 3 (14.3) 9 (14.8) 180 (15.6)
20–29 355 (33.2) 5 (23.8) 22 (36.1) 382 (33.2)
30–39 165 (15.4) 6 (28.6) 8 (13.1) 179 (15.6)
40–49 116 (10.9) 2 (9.5) 10 (16.4) 128 (11.1)
50–50 92 (8.6) 2 (9.5) 2 (3.3) 96 (8.3)
>60 84 (7.9) 1 (4.8) 7 (11.5) 92 (7.9)
Total 1069 (100) 21 (100) 61 (100) 1151 (100)
Statistical test χ 2 = 11.11 p = 0.677