A Case-Control Study of the Role of Human Papillomavirus in Oesophageal Squamous Cell Carcinoma in Australia

Table 1

Characteristics of cases and controls.

Variable	Cases (%)*	Controls (%)	P value
Mean age	67.5	52.3	N/A
Male	50/99 (51)	52/100 (52)	0.83
Deceased	39/54 (72)	0/100 (0)	<0.001
HPV	1/99 (1)	0/100 (0)	0.31
History of other ADCs	10/58 (17)	0/100 (0)	<0.001
Smoking	55/84 (65)	45/100 (45)	0.005
Alcohol	55/74 (74)	81/100 (81)	0.29

N/A: not applicable; ADCs: Aerodigestive cancers.
*Although a total of 99 case specimens were included in our study, poor quality of obtainable data meant that not all information was recorded for every case. Therefore, variation of denominators in this column indicates the total number of cases for which information on the corresponding variable could be determined.