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Table 1 Baseline characteristics of MS patients and their healthy controls

From: Environmental exposures and the risk of multiple sclerosis in Saudi Arabia

Baseline characteristics MS patients (n = 307) Controls (n = 307) P value
n (%) n (%)
 Female 230 (75) 230 (75) 1
 Male 77 (25) 77 (25)
Age, mean (SD) 32.91 (±8.82) 32.89 (±8.64)  
 18–29 128 (41.7) 128 (42) 0.94
 30–39 106 (35) 111 (36)
 40–49 56 (18) 50 (16)
 50–59 16 (5) 16 (5)
 60–69 1 (0.3) 2 (1)
Level of education
 Less than university 142 (46) 158 (52) 0.30
 University 149 (49) 130 (42)
 Postgraduate 16 (5) 19 (6)
Main work status over the last 12 months
 Employed 158 (52) 186 (61) 0.127
 Unemployed 23 (8) 15 (5)
 Student 37 (12) 32 (10)
 Housewife 89 (29) 74 (24)
Average earnings of the householda
  < 7500 87 (33) 87 (31) 0.19
 7500–12,499 101 (38) 114 (40)
  ≥ 12,500 80 (30) 83 (29)
  1. a62 total missing. (most of them did not know), 39 MS patients and 23 controls