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. 2020 Sep 16;15(9):e0238317. doi: 10.1371/journal.pone.0238317

Table 2. Descriptive analyses of fatal coastal bystander rescue incidents.

Incident-related Variables Annual average (%) Expected Proportion (%) Test statistic (p-value) Victim-related Variables Annual average (%) Expected Proportion (%) Test statistic (p-value)
State a   Gender a  
  NSW 2.2 (49) 49 X2 = 17.994 (p = 0.013)E Male 3.6 (81) 50 Χ2 = 25.090 (p < 0.001)
  VIC 0.73 (16) 16 Female 0.87 (19) 50
  QLD 0.6 (13) 13   Age a  
  WA 0.33 (7) 7   0–17 0.2 (4) 23 X2 = 22.644 (p < 0.001)E
  SA 0.27 (6) 6   18–29 1.07 (24) 17
  NT 0.2 (4) 4   30–44 1.6 (36) 21  
  TAS 0.13 (3) 3   45–59 1.13 (25) 19  
Remoteness a 60+ 0.47 (10) 19  
  Major Cities 1.27 (28) 70 X2 = 61.654 (p < 0.001)E Activity before rescue attempt b  
  Inner Regional 1.93 (43) 19 Swimming/Wading 3.13 (70) 36 X2 = 54.078 (p < 0.001)E
  Outer Regional 0.87 (19) 9   Rock Fishing 0.33 (7) 13
  Remote/Very Remote 0.4 (9) 2   Boating 0.27 (6) 21  
    Snorkelling/Scuba 0.27 (6) 12  
Season b   Land-based Fishing 0.27 (6) 1  
  Summer 2 (45) 45 X2 = 6.232 (p = 0.101)E Other 0.2 (4) 16  
  Autumn 1.4 (31) 34 Visitor status b  
  Winter 0.2 (4) 4   Local 1.47 (35) 30 X2 = 10.470 (p = 0.033)
  Spring 0.87 (19) 19   Resident 0.4 (10) 26
Time of day b   Intrastate 1.27 (31) 27  
  Morning 0.67 (15) 34 X2 = 10.869 (p = 0.004) Interstate 0.53 (13) 7  
  Afternoon 3.2 (72) 54 International 0.47 (11) 10  
  Evening 0.6 (13) 12   Unknown 0.33 (*) *  
  Night 0 (*)   Toxicology b  
Distance from Surf Lifesaving Services b None 3.8 (85) 77 X2 = 2.250
  < 1 km 1 (22) 33 X2 = 3.563 (p = 0.168) Alcohol/Drugs 0.67 (15) 23 (p = 0.134)
  1–5 km 1.33 (30) 23 Birth continent a  
  > 5 km 2.13 (48) 44   Australia/Oceania 2.73 (68) 76 X2 = 64.639 (p < 0.015)
Location b   Asia 0.87 (22) 10
  Beach 2.87 (64) 50 X2 = 9.421 (p = 0.024)E Europe 0.4 (10) 11
  Rocks/Cliff 1 (22) 20 Unknown 0.47 (*) *
  Offshore 0.27 (6) 18   Continent of residence a  
  Bay/ Marina /Jetty 0.33 (8) 12   Australia 3.87 (88) 78 X2 = 1.078 (p = 0.583)E
Asia 0.4 (9) 13
Rip presence b   Europe 0.27 (6) 6  
  Yes 3.07 (73) 23 X2 = 88.793 (p < 0.001) Unknown 0.07 (*) *  
  No 1.13 (27) 77 Rescuee relationship d  
  Unknown 0.27 (*) *   Family 3.07 (69) 25 X2 = 69.537
Flotation device used c Friend 0.67 (15) 25 (p < 0.001)
  Yes 0.13 (3) 50 z = 64.000 (p < 0.001) Stranger 0.4 (9) 25  
  No 4.33 (97) 50 Other 0.33 (7) 25  
Day of week d   Rescuee age c  
  Weekend day 2.2 (49) 29 X2 = 13.348 (p < 0.001) Child (<18) 2.73 (64) 50 z = 41.00 (p = 0.034)
  Weekday 2.27 (51) 71 Adult (18+) 1.53 (36) 50
      Other/Unknown 0.2 (*) *  

* Shows excluded variables, bold text denote significance, subscripts denote analysis method. Annual average is presented for ethical requirements.

a Proportions compared with mean population proportions (2004–19)

b proportions compared against non-rescue incidents (2004–19)

c one-sample binomial analysis

d one-sample chi-square analysis

E shows p-value reported is Fishers Exact Test.