Table 3

Associations between whether at least one bike light was turned on and trip or personal characteristics, variables retained in adjusted analysis only, each variable on its own (unadjusted) and in multiple logistic regression (adjusted)
At least one bike light turned on
Yes/No (% Yes/% No)* Unadjusted Odds Ratio (95% Confidence Interval) Adjusted Odds Ratio (95% Confidence Interval)
Trip time of day
 Day 32/503 (6/94) 1 (reference) 1 (reference)
 Dawn or dusk 22/28 (44/56) 12.6 (6.49 – 24.6) 13.2 (6.42 – 27.2)
 Night 81/24 (77/23) 50.2 (30.0 – 90.2) 71.1 (35.8 – 141)
Trip weather type
 Clear sky 63/414 (13/87) 1 (reference) 1 (reference)
 Cloud cover 39/93 (30/70) 2.91 (1.83 – 4.61) 3.43 (1.83 – 6.41)
 Fog, mist, rain or snow 25/35 (42/58) 4.85 (2.72 – 8.65) 3.07 (1.33 – 7.10)
 Wind 3/11 (21/79) 2.03 (0.55 – 7.61) 1.75 (0.30 – 10.4)
Trip day of week
 Weekday 109/422 (21/79) 1 (reference) 1 (reference)
 Weekend 26/133 (16/84) 0.73 (0.45 – 1.19) 0.48 (0.24 – 0.97)
Sex
 Male 92/318 (22/78) 1 (reference) 1 (reference)
 Female 43/237 (15/85) 0.60 (0.40 – 0.91) 0.56 (0.32 – 0.99)
Helmet worn during trip
 No 33/179 (16/84) 1 (reference) 1 (reference)
 Yes 102/376 (21/79) 1.45 (0.93 – 2.25) 3.15 (1.61 – 6.16)

Significant associations in bold.

* Row percent.

Teschke et al.

Teschke et al. BMC Public Health 2012 12:765   doi:10.1186/1471-2458-12-765

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