Table 1: Demographic characteristics of participants.

CharacteristicSupplements users (%)Non-supplements user (%) value

Age (years), median (IQR)27 (22–31)28 (23–33)0.133
Sex
 (i) Male101 (89.4)125 (67.2)<0.0001
 (ii) Female12 (10.6)61 (32.8)
Smoking status
 (i) Yes51 (45.1)54 (29)0.005
 (ii) No62 (54.9)132 (71)
Nationality
 (i) Saudi93 (82.3)141 (78.8)0.187
 (ii) Non-Saudi20 (17.7)45 (24.2)
Level of education
 (i) Less than high school1 (0.9)2 (1.1)0.945
 (ii) High school35 (31)52 (28)
 (iii) Bachelor62 (54.9)108 (58.1)
 (iv) Master/Ph.D.15 (13.3)24 (12.9)
Income (SR)
 (i) 3,000 to <5,00039 (34.5)58 (31.2)0.157
 (ii) 5,000 to <10,00029 (25.7)35 (18.8)
 (iii) 10,000 to <20,00033 (29.2)53 (28.5)
 (iv) 20,000 to <30,0008 (7.1)25 (13.4)
 (v) >30,0004 (3.5)15 (8.1)

value: Mann–Whitney for difference in medians and test for difference proportions.