Table 1.

Two Clusters Formed by Means of a Principal Component Analysis With Two Components (Explained Variation = 5%)

Cluster 1
No/Some Complaints
Cluster 2
Frequent Complaints
Groups
 VT group62 (50.0%)49 (49.1%)
 WW group62 (50.0%)28 (50.9%)
Sex
 Male69 (55.7%)35 (63.6%)
 Female55 (44.4%)20 (36.4%)
Adenoidectomy
 Yes5 (4.0%)11 (20.0%)
 No119 (96.0%)44 (80.0%)
Fever
 Yes8 (6.5%)49 (89.1%)
 No116 (93.6%)6 (10.9%)
Earache
 Yes31 (25.0%)55 (100%)
 No93 (75.0%)0 (0%)
Common colds 3.8 4.7
Hearing level at T = 0 (dB)44.645.4