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Table 3 Multivariable logistic regression model for odds of upper extremity injury among bicyclists in Ohio, 2013–2017

From: A cross-sectional study of characteristics of bicyclist upper and lower extremity injuries in bicycle-vehicle crashes in Ohio, United States, 2013–2017

Variable N (%) Crude estimate
(standard error)
Crude odds ratio (95%CI) a Adjusted estimate
(standard error)
Adjusted odds ratio (95% CI) b
Bicyclist age category, years
 3–14 343 (36.4) 0.04 (0.10) 1.04 (0.85–1.27) −0.04 (0.11) 0.96 (0.78–1.18)
 15–24 418 (38.1) 0.11 (0.10) 1.12 (0.93–1.35) 0.08 (0.01) 1.08 (0.89–1.31)
 25–44 296 (35.5) -- c -- c -- c --c
 45–64 323 (39.8) 0.18 (0.11) 1.20 (0.98–1.48) 0.17 (0.11) 1.19 (0.97–1.47)
 65+ 73 (46.1) 0.44 (0.18) * 1.56 (1.10–2.21) 0.38 (0.18) * 1.46 (1.03–2.08)
Weather condition
 Non-adverse weather condition 1364 (38.3) -- c --c -- c --c
 Adverse weather condition 89 (31.6) −0.30 (0.14) * 0.74 (0.57–0.97) − 0.21 (0.14) 0.81 (0.62–1.07)
Time-of-day
 Daytime 1154 (38.8) -- c --c -- c --c
 Nighttime 299 (34.6) −0.19 (0.08) * 0.83 (0.71–0.98) −0.07 (0.09) 0.93 (0.78–1.11)
Quarter
 Quarter 1(January–March) 84 (30.7) −0.42 (0.14) ** 0.66 (0.50–0.87) −0.43 (0.15) ** 0.65 (0.49–0.87)
 Quarter 2 (April–June) 482 (40.4) 0.00 (0.08) 1.00 (0.86–1.17) 0.02 (0.08) 1.02 (0.87–1.19)
 Quarter 3 (July–September) 667 (40.3) -- c --c -- c --c
 Quarter 4 (October–December) 220 (30.5) −0.43 (0.10) ** 0.65 (0.53–0.79) −0.42 (0.10) ** 0.66 (0.54–0.81)
Year-of-crash
 2013 267 (34.0) -- c --c -- c --c
 2014 304 (37.9) 0.17 (0.11) 1.19 (0.96–1.47) 0.14 (0.11) 1.15 (0.92–1.43)
 2015 263 (36.8) 0.12 (0.12) 1.13 (0.89–1.42) 0.12 (0.12) 1.13 (0.89–1.43)
 2016 304 (39.1) 0.22 (0.11) * 1.25 (1.01–1.54) 0.23 (0.11) * 1.26 (1.02–1.56)
 2017 315 (41.2) 0.31 (0.11) ** 1.36 (1.09–1.69) 0.31 (0.11) ** 1.36 (1.09–1.70)
  1. Note: a Odds ratio calculated from the logistic regression model with a single explanatory variable
  2. b Odds ratio calculated from the multivariable logistic regression model including covariates for bicyclist age category, adverse weather conditions, time-of-day, quarter, and year-of-crash
  3. c refers to reference group
  4. Data sources: Ohio Hospital Association and Ohio Department of Public Safety
  5. Bolded values indicate the 95% confidence interval excludes 1
  6. * refers the p value < 0.05
  7. ** refers the p value < 0.01