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Table 2 Background data at baseline (n = 133). There were no significant differences in any of the comparisons between the variables

From: COMT genotype and non-recovery after a whiplash injury in a Northern European population

  Total
n = 133 (%)
LPS
n = 20 (%)
APS
n = 102 (%)
HPS
n = 11 (%)
Female sex 75 (56) 11 (55) 57 (56) 7 (64)
Ethnicity
 Caucasian 114 (86) 17 (15) 88 (77) 9(8)
 Caucasian-Hispanic 7 (5) 1 (14) 6 (85) 0 (0)
 Asian 2 (1) 1 (50) 0 (0) 1 (50)
 Middle Eastern 9 (7) 1 (11) 8 (89) 0 (0)
 African 1(1) 0 (0) 0 (0) 1 (100)
Educational level
 High school 92 (69) 15 (75) 71 (70) 6 (55)
 University 41 (31) 5 (25) 31 (30) 5 (45)
 Employed (yes) 109 (82) 15 (75) 85 (83) 9 (82)
 Smoker (yes) 34 (26) 5 (26) 27 (28) 2 /18)
Self-ratings of mental health n (%) n n n
 HAD depression (yes) 12 (9.8) 2 8 2
 HAD anxiety (yes) 24 (20.2) 3 20 1
 PTSD (yes) 11 (8.7) 3 7 1
 Age (years) mean (SD) mean (SD) mean (SD) mean (SD)
  40 (13) 43 (18) 40 (13) 41 (15)