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Table 2 Responses to selected questions on safety belt use

From: Self-reported safety belt use among emergency department patients in Boston, Massachusetts

Variable Total Sample N (%) SBU 'Always', by Single Measure N (%) Chi Square P value SBU 'Always', by Multiple Measure N (%) Chi Square P value
Ever been in crash?
   Yes 250 (66) 109 (57) 14.03 <0.001 60 (61) 1.04 0.308
   No 130 (34) 83 (43)    38 (39)   
Driving after drinking (in past 30 days)?
   Yes 24 (6) 5 (3) 9.57 0.008 3 (3) 22.17 <0.001
   No 298 (78) 154 (80)    93 (95)   
   I don't drive 58 (15) 33 (17)      
Ride with someone who drove after drinking (in past 30 days)?
   Yes 57 (15) 14 (7)    9 (9) 3.419 0.064
   No 323 (85) 178 (93)    89 (91)   
Ever given ticket for not wearing a seatbelt?
   Yes 42 (11) 9 (5) 15.9 <0.001 4 (4) 6.84 0.033
   No 337 (89) 182 (95)    94 (96)   
How often did you use public transportation in past 30 days?
   10+ times 184 (48) 89 (46) 1.02 0.795 31 (32) 15.7 0.001
   5–9 times 23 (6) 11 (6)    7 (7)   
   1–4 times 49 (13) 25 (13)    16 (16)   
   Not in past 30 days 124 (33) 67 (35)    44 (45)   
On average, how many drinks do you have on a typical day?
   0–1 drinks 228 (60) 131 (68) 14.053 <0.001 66 (67) 6.847 0.033
   2–5 drinks 110 (29) 49 (26)    28 (29)   
   6 + drinks 42 (11) 12 (6)    4 (4)   
Maximum # of drinks on a given day (in past 30 days)?
   0–1 drinks 223 (59) 130 (68) 17.52 <0.001 64 (65) 9.94 0.007
   2–5 drinks 95 (25) 44 (23)    28 (29)   
   6 or more drinks 62 (16) 18 (9)    6 (6)   
  1. SBU = Safety Belt Use