Table 1.

Demographic Characteristics of the N=25444 Participants in the Physicians’ Health Studies I and II with Information on Dry Eye Disease

Characteristic	Total in Category	Number (%) With DED*
Age
50 – 54	2513	98 (3.90)
55 – 59	5936	197 (3.32)
60 – 64	4805	145 (3.02)
65 – 69	4326	173 (4.00)
70 – 74	3554	184 (5.18)
75 – 79	2433	162 (6.66)
80 +	1877	144 (7.67)
Race/ethnicity
White	23056	993 (4.31)
African American	609	30 (4.93)
Asian/Pacific Islander	241	14 (5.81)
Hispanic	1182	53 (4.48)
Unknown, Other	356	13 (3.65)
Region of residence†
West	5668	249 (4.39)
Midwest	6561	284 (4.33)
Northeast	5622	233 (4.14)
South	7417	324 (4.37)
Outside of US (including Puerto Rico, Guam and other US territories)	176	13 (7.39)

^*DED = dry eye disease, defined as a reported clinical diagnosis or symptoms of both dryness and irritation either constantly or often

^**According to US census region