Skip to main content

Table 2 Sample representativeness of the study population

From: Incidence of depression, anxiety and stress following traumatic injury: a longitudinal study

Characteristics Total Participants Non-participants Stat
Patient demographics     
Total number of patients (n) 1335 201 (15.1%) 1134 (84.9%)  
Age (years)     
Mean (SD) [Range] 49 (23) [1–96] 49 (18) [18–94] 49 (24) [1–96] T = 0.09, df = 345.7, p = 0.929
Gender (%)     χ2 = 4.16, df = 1, p = 0.041
Female 421 (31.5%) 51 (25.4%) 370 (32.6%)  
Male 914 (68.5%) 150 (74.6%) 764 (67.4%)  
Clinical characteristics     
ISS     
Median (IQR) 8 (4–16) 9 (5–14) 8 (4–16) MW = 108948.0, p = 0.318
Poly trauma (%)     χ2 = 3.04, df = 1, p = 0.081
Yes 878 (65.8%) 143 (71.1%) 735 (64.8%)  
No 457 (34.2%) 58 (28.9%) 399 (35.2%)  
ICU admission (%)     χ2 = 5.42, df = 1, p = 0.020
Yes 181 (16.4%) 18 (10.4%) 163 (17.5%)  
No 921 (83.6%) 155 (89.6%) 766 (82.5%)  
Mechanism of injury     χ2 = 50.70, df = 10, p < 0.001
Fall greater than 1 Meter 464 (35.1%) 56 (27.9%) 408 (36.4%)  
MVC driver 262 (19.8%) 44 (21.9%) 218 (19.4%)  
MBC rider 114 (8.6%) 32 (15.9%) 82 (7.3%)  
Pedal cyclist 77 (5.8%) 23 (11.4%) 54 (4.8%)  
Violence 72 (5.4%) 10 (5%) 62 (5.5%)  
Pedestrian 114 (8.6%) 8 (4%) 106 (9.5%)  
MVC passenger 85 (6.4%) 8 (4%) 77 (6.9%)  
Industrial 27 (2%) 8 (4%) 19 (1.7%)  
MBC passenger 12 (0.9%) 4 (2%) 8 (0.7%)  
Penetrating or cutting injury 43 (3.3%) 3 (1.5%) 40 (3.6%)  
Sport and other 52 (3.9%) 5 (2.5%) 47 (4.2%)