Figure 1.

Baseline (2002–2005) caffeine intake and progression of lower urinary tract symptoms (LUTS) at 5-year follow-up (2006–2010) among men from the Boston Area Community Health Survey: multivariable-adjusted log odds ratios with 95% confidence intervals (bar set at reference value of 1.0). Quartiles of average daily caffeine intake were as follows: first quartile, 0–48.0 mg; second quartile, 48.1–163.9 mg; third quartile, 164.0–339.9 mg; and fourth quartile, ≥340.0 mg. IPSS, International Prostate Symptom Score.