Skip to main content

Advertisement

Table 3 Blood alcohol concentration (BAC) readings of river users by daily maximum temperatures, river attendance information and self-reported swimming ability, chi square (N = 684)

From: Breathalysing and surveying river users in Australia to understand alcohol consumption and attitudes toward drowning risk

  Total Alcohol Yes Alcohol No X2 (p value) comparing alcohol yes to alcohol no X2 comparing over BAC < 0.05% to BAC ≥0.05%
  BAC 0.001–0.049% BAC ≥0.050%
  N % N % N % N %
Daily maximum air temperature degrees Celsius (Fahrenheit)
  < 32.0 (< 89.6) 182 26.6 6 3.3 1 0.5 173 95.1 22.361 (p < 0.001) 11.343 (p < 0.001)*
 32.0–35.9 (89.6–96.6) 167 24.4 16 9.6 10 6.0 141 84.4 0.022 (p = 0.882) 0.459 (p = 0.498)
 36.0–39.9 (96.8–103.8) 189 27.6 22 11.6 21 11.1 146 77.2 9.056 (p = 0.003) 6.119 (p = 0.013)
  ≥ 40.0 (≥104.0) 146 21.3 16 11.0 15 10.3 115 78.8 3.888 (p = 0.049) 2.700 (p = 0.100)
At river alone or with others
 Alone 41 6.0 2 4.9 0 0.0 39 95.1 3.981 (p = 0.046) 3.366 (p = 0.107)*
 With friends 412 60.2 39 9.5 44 10.7 329 79.9 13.707 (p < 0.001) 19.257 (p < 0.001)
 With family 317 46.3 22 6.9 11 3.5 284 89.6 13.466 (p < 0.001) 12.120 (p < 0.001)
Frequency of visiting any river in the last 30 days (month)
 1–2 times 248 36.3 19 7.7 21 8.5 208 83.9 0.004 (p = 0.947) 0.946 (p = 0.331)
 3–5 times 166 24.3 15 9.0 6 3.6 145 87.3 1.838 (p = 0.175) 4.215 (p = 0.040)
 6–10 times 128 18.7 10 7.8 8 6.3 110 85.9 0.443 (p = 0.506) 0.211 (p = 0.646)
 11+ times 139 20.3 16 11.5 14 10.1 109 78.4 4.040 (p = 0.044) 2.164 (p = 0.141)
 Unknown 3 0.4 0 0.0 0 0.0 3 100.0
Length of time spent in water (in minutes)
 0 min 152 22.2 15 9.9 3 2.0 134 88.2 2.445 (p = 0.118) 7.915 (p = 0.004)*
 1–30 min 283 41.4 32 11.3 17 6.0 234 82.7 0.685 (p = 0.408) 0.971 (p = 0.324)
 31–60 min 87 12.7 5 5.7 3 3.4 79 90.8 3.380 (p = 0.066) 2.069 (p = 0.184)*
 61–120 min 53 7.7 4 7.5 7 13.2 42 79.2 0.996 (p = 0.318) 3.155 (p = 0.091)*
 121–300 min 89 13.0 4 4.5 13 14.6 72 80.9 0.765 (p = 0.382) 8.523 (p = 0.007)*
 301+ minutes 20 2.9 0 0.0 6 30.0 14 70.0 3.042 (p = 0.081) 16.155 (p = 0.002)*
  1. Please note: Chi square analysis excludes the other/unknown variables. *p value reported is Fisher’s Exact Test