Table 2.

Comparisons of phonasthenic manifestations between the different groups

Item	Group 1 “Pneumonia” “n = 212”	Group 2 “Severe Pneumonia” “n = 152”	Group 3 “Control” “n = 100”	P value
Phonasthenic manifestations
Yes  No	129 (60.8%) 83 (39.2%)	133 (87.5%) 19 (12.5%)	12 (12.0%) 88 (88.0%)	P < 0.000 *P < 0.000 **P < 0.000 ***P < 0.01

Using Chi-Square test *P; group 1 to group 3, **P; group 2 to group 3 ***P; group 1 to group 2