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Table 3 Distribution of severe injuries (ISS ≥ 8) according to a set of independent variables

From: Effect of motorcycle helmet types on head injuries: evidence from eight level-I trauma centres in Taiwan

Variable

Injury Severity Score

P value

ISS ≥ 8

n (%)

ISS < 8

n (%)

Helmet type

1. Nonstandard helmet

306 (49.84%)

308 (50.16%)

0.051

2. Standard helmet

49 (40.16%)

73 (59.84%)

Age

1. ≥ 65 years

50 (65.79%)

26 (34.21%)

0.001

2. Other age group

309 (46.26%)

359 (53.74%)

Sex

1. Male

221 (49.66%)

224 (50.34%)

0.348

2. Female

138 (46.15%)

161 (53.85%)

Occupation

1. Full-time job

196 (46.67%)

224 (53.33%)

0.518

2. No full-time job

136 (49.45%)

139 (50.55%)

Auditory disease

1. Yes

12 (52.17%)

11 (47.83%)

0.152

2. No

333 (48.05%)

360 (51.95%)

Visual illness

1. Yes

189 (50.13%)

188 (49.87%)

0.839

2. No

165 (46.74%)

188 (53.26%)

Anaemia

1. Yes

35 (59.32%)

24 (40.68%)

0.076

2. No

311 (47.26%)

347 (52.74%)

Hypertension

1. Yes

46 (47.92%)

50 (52.08%)

0.954

2. No

300 (48.23%)

322 (51.77%)

Time of traffic

1. Dawn/night

83 (53.21%)

73 (46.79%)

0.281

2. Daylight

254 (48.29%)

272 (51.71%)

Traffic location

1. Downtown area

269 (47.28%)

300 (52.72%)

0.522

2. Provincial highway

20 (52.63%)

18 (47.37%)

Other protective gears

1. No

57 (49.57%)

58 (50.43%)

0.767

2. Yes

297 (48.06%)

321 (51.94%)

Crash type

1. Multiple vehicle

272 (50.75%)

264 (49.25%)

0.011

2. Single vehicle

79 (40.10%)

118 (59.90%)

Medication before riding

1. Yes

19 (63.33%)

11 (36.67%)

0.091

2. No

338 (47.61%)

372 (52.39%)

Drunk riding

1. Yes (BAC level > 0.03%)

15 (68.18%)

7 (31.82%)

0.056

2. No (BAC level ≤ 0.03%)

340 (47.49%)

376 (52.51%)

Using a mobile phone

1. Yes

27 (65.85%)

14 (34.15%)

0.020

2. No

330 (47.21%)

369 (52.79%)