Table 1

Symptom frequency, sex, and age difference between study participants and non-participants

Participants (n=341)Non-participants (n=275)p Value
Sex (frequency (%))
 Male152 (44.6)140 (50.9)p=0.1181-150
 Female189 (55.4)135 (49.1)
Age (median (IQR))
 Male46 (35, 57)40 (29, 55)p=0.044
 Female49 (35, 59)38 (28, 60)p=0.005
Ocular symptoms (frequency (%))
(from general health survey)
 Yes96 (30.2)45 (16.6)p<0.00011-150
 No222 (69.8)226 (83.4)
Oral symptoms (frequency (%))
(from general health survey)
 Yes85 (26.7)52 (19.2)p=0.0331-150
 No234 (73.3)219 (80.8)
  • 1-150 p Value, χ2 test. p Value, Mann-Whitney test.Frequencies do not add to totals because of missing data.