Table I.

Cross-tabulation of ISSNHL grade at onset (t = 0) and after 30 days. The table shows the overall classification changes over the observed 30-day period. The rows of the table provide information on the re-distribution of patients (slight, moderate, etc.). The columns show data on the composition of a certain group, that is where its members are coming from at 30 days.

For example, the distribution of the 33 severe cases at onset (group total under the "Total" right-hand column) changes at 30 days (read data from row 3 in the table) as follows; 1 case moves to the normal category; 2 cases move to the slight HL category; 8 cases move to the moderate HL category; and 22 cases remain in the severe category.

The 33 severe HL cases at t = 0 became 26 (see total under the "severe" column) at 30 days. This number is composed from contributions of the following groups: 1 case from the moderate group showed a threshold deterioration and was moved to the severe group; 22 cases from the severe group were classified into the same category; 3 cases from the profound group moved to the severe HL category.

		ISSNHL grade at 30 days: all subjects
		Normal	Slight	Moderate	Severe	Profound	Total
ISSNHL grade at onset	Slight	88.9% (8)	11.1% (1)	–	–	–	6.4% (9)
	Moderate	42.0% (34)	17.3% (14)	39.5% (32)	1.2% (1)	–	57.5% (81)
	Severe	3.0% (1)	6.1% (2)	24.2% (8)	66.7% (22)	–	23.4% (33)
	Profound	–	5.6% (1)	27.8% (5)	16.7% (3)	50.0% (9)	12.7% (18)
Total ISSNHL at 30 days		30.5% (43)	12.8% (18)	31.9% (45)	18.4% (26)	6.4% (9)	100% (141)