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Table 1 Injury characteristics and association with positive alcohol use prior to arriving at the ED

From: The impact of alcohol among injury patients in Moshi, Tanzania: a nested case-crossover study

  Total (N = 516) BAC Positive (N = 156) BAC Negative (N = 360) P Value AOR CI 95% P value
Sociodemographics
 Age (years), Mean (SD) 34.4 (13.3) 35.2 (11.2) 33.9 (14.1) 0.31 1.01 (1.00–1.03) 0.152
 Male, N (%) 394 (76.4) 135 (86.5) 259 (72.0) < 0.001 * 2.29 (1.31–4.15) 0.004
 Education (years), Mean (SD) 9.6 (9.5) 10.3 (10.1) 8.7 (7.9) 0.123 0.98 (0.94–1.01) 0.271
 Employed, N (%) 416 (80.6) 141 (90.4) 274 (76.4) < 0.001 * 0.46 (0.24–0.85) 0.016
Injury characteristics
 Time since injury (hours), Mean (SD) 2.6 (1.4) 2.8 (1.5) 2.5 (1.4) 0.034 * 1.09 (0.94–1.27) 0.244
 KTS, Mean (SD) 14.3 (0.9) 14.2 (0.9) 14.3 (0.9) 0.395 1.03 (0.74–1.44) 0.841
 RTS, Mean (SD) 7.7 (0.5) 7.7 (0.4) 7.7 (0.6) 0.831 1.12 (0.63–2.23) 0.719
 Unintentional Injury 440 (85.3) 122 (78.2) 318 (88.3) 0.003 * 3.33 (0.91–14.0) 0.081
Type of injury
 Fracture 185 (35.8) 61 (39.1) 124 (34.4) 0.311 1.45 (0.89–2.37) 0.138
 Dislocation 80 (15.5) 16 (10.3) 64 (17.7) 0.050 * 0.8 (0.40–1.52) 0.501
 Open Wound 197 (38.2) 79 (50.6) 118 (32.8) 0.030 * 2.04 (1.29–3.26) 0.003
 Bruise 111 (22.5) 28 (17.9) 83 (23.1) 0.195 0.74 (0.43–1.27) 0.282
 Concussion 149 (28.9) 46 (29.5) 103 (28.6) 0.84 1.28 (0.77–2.10) 0.341
 Organ Injury 56 (10.9) 14 (9.0) 42 (11.7) 0.366 0.94 (0.43–1.96) 0.87
Mechanism of Injury
 RTI 375 (72.7) 109 (69.9) 266 (73.9) 0.245 Ref   
 Violence 88 (17.0) 33 (21.1) 55 (15.3)   0.26 (0.05–1.10) 0.08
 Fall/Trip 53 (10.3) 14 (9.0) 39 (10.8)   0.67 (0.25–1.69) 0.403
Location of Injury
 Outdoor public place 399 (77.3) 118 (75.6) 281 (78.1) < 0.001 Ref   
 Drinking place 17 (3.3) 13 (8.3) 4 (1.1)   9.27 (2.38–44.9) 0.003
 Home 45 (8.7) 17 (10.9) 28 (7.8)   1.88 (0.72–4.97) 0.2
 Work place 41 (8.0) 4 (2.6) 37 (10.3)   0.26 (0.07–0.81) 0.031
 Other 14 (2.7) 4 (2.6) 10 (2.8)   1.18 (0.29–4.17) 0.802
  1. p-value is a comparison between BAC positive and BAC negative
  2. VRU Vulnerable road user, RTI Road traffic injury, BAC Breathlizer Alcohol Positive
  3. *Significant at P < 0.05
  4. Italics indicate p < 0.05