Table 1: Baseline characteristics and risk factors stratified by age classes.

Age classes 16–29 years 30–39 years 40–44 years Total

Patient number (%) 52 (16.0) 141 (43.5) 131 (40.4) 324 (100)
Male/female 27/25 71/70 64/67 162/162

Risk factors (%)

Smoking 17 (32.7) 51 (36.2) 62 (47.3) 130 (40.1)
Hypertension 2 (3.8*) 25 (17.7*) 41 (31.3) 68 (21)
Oral contraceptives 12 (23.1) 29 (20.6) 27 (20.6) 68 (21°)
Hypercholesterolemia 5 (9.6) 29 (20.6) 31 (23.7) 65 (20.1)
Migraine 11 (21.2) 29 (20.6) 15 (11.5) 55 (17)
Hyperhomocysteinemia 10 (19.2) 23 (16.3) 18 (13.7) 51 (15.7)
Previous vascular events 7 (13.5) 20 (14.2) 21 (16) 48 (14.8)
Family history of stroke 2 (3.8) 10 (7.1) 13 (9.9) 25 (7.7)
Obesity 2 (3.8) 4 (2.8) 13 (9.9) 19 (5.9)
Others°°

< 0.05 < 0.01.
°When tested in women is 42% of the sample.
°°Other risk factors with frequency below 5% were trauma 12 (3.7%); diabetes mellitus 11 (3.4%); heavy drinking 10 (3.1%); illicit drug use 5 (1.5%); ischemic cardiopathy 5 (1.5%); atrial fibrillation 4 (1.2%); pregnancy/puerperium 6 (1.9%).