Table 3.

Crude and age-adjusted rate ratios (RR) and 95% confidence intervals (CI) for association between visual function and crash involvement for five years prior to enrollment

Visual function	Crude RR (95% CI)	Age-adjusted RR (95% CI)
Contrast sensitivity, log sensitivity
≥ 1.5 (better)	REF	REF
< 1.5 (worse)	1.6 (0.8–3.2)	1.5 (0.8–3.2)
UFOV subtest 2, ms
< 150 (better)	REF	REF
150–350	1.3 (0.7–2.6)	1.1 (0.5–2.2)
> 350 (worse)	4.3 (1.8–10.0)	3.6 (1.5–8.5)
Overall visual field sensitivity, dB
> 22.4 (better)	REF	REF
≤ 22.4 (worse)	1.6 (0.8–3.1)	1.4 (0.7–5.2)
Peripheral visual field sensitivity, dB
> 19.2 (better)	REF	REF
≤ 19.2 (worse)	2.5 (1.4–4.6)	2.4 (1.3–4.4)
Superior visual field sensitivity, dB
> 22.0 (better)	REF	REF
≤ 22.0 (worse)	0.8 (0.4–1.6)	0.7 (0.4–1.5)
Inferior visual field sensitivity, dB
> 22.1 (better)	REF	REF
≤ 22.1 (worse)	1.8 (1.0–3.2)	1.7 (0.9–3.0)
Left visual field sensitivity, dB
> 21.6 (better)	REF	REF
≤ 21.6 (worse)	1.9 (1.1–3.6)	1.7 (0.9–3.2)
Right visual field sensitivity, dB
> 21.8 (better)	REF	REF
≤ 21.8 (worse)	1.7 (0.9–3.1)	1.6 (0.9–3.0)
Gabor drifting grating threshold, Hz
< 0.14 (better)	REF	REF
≥ 0.14 (worse)	2.9 (1.5–5.6)	2.7 (1.4–5.2)