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Table 1 Patient characteristics at cohort entry

From: Health-related quality of life in persons with West Nile virus infection: a longitudinal cohort study

  Total
(n = 154)
Disease classification
Neuroinvasive
(n = 62)
Nonneuroinvasive
(n = 92)
Mean age (sd), yearsa 52 (13) 55 (15) 50 (12)
Female (%) 75 (49) 26 (42) 49 (53)
Mean follow up (sd), monthsa 11 (9) 11 (6) 9 (5)
Lost to follow-up at one year (%) 95 (62) 32 (52) 63 (68)
Comorbid conditions (%):
 Asthma 14 (9) 4 (6) 10 (11)
 COPDa 4 (3) 4 (6) 0 (0)
 Cancer 17 (11) 5 (8) 12 (13)
 Cardiac disease 21 (14) 12 (19) 9 (10)
 Cerebrovascular disease 3 (2) 2 (3) 1 (1)
 Diabetesa 11 (7) 9 (15) 2 (2)
 Liver diseasea 6 (4) 5 (8) 1 (1)
 Lung disease 16 (10) 9 (15) 7 (8)
 Renal disease 7 (5) 4 (6) 3 (3)
 Transplant 5 (3) 3 (5) 2 (2)
Mean number of comorbid conditions (sd)a 0.9 (0.10) 1.2 (0.2) 0.7 (0.1)
Prior hospitalizations (%) 118 (77) 51 (82) 67 (73)
Disease classification (%)
 Neuroinvasive 62 (40)
 Encephalitis 21 (14)
 Meningitis 3 (2)
 Acute flaccid paralysis 6 (4)
 Meningo-encephalitis 32 (21)
 Nonneuroinvasive 92 (60)
  1. Abbreviations: sd, standard deviation; COPD, chronic obstructive pulmonary disease
  2. aSignificant differences (p < 0.05) between patients with neuroinvasive and nonneuroinvasive disease. P value from independent samples t-tests