Figure 1.

Association between average daily intake of alcoholic drinks and risk of active tuberculosis using restricted cubic spline regression with four knots*. *Adjusted for age at recruitment (years), year of baseline interview (1993–1995, 1996–1998), gender, dialect group (Hokkien, Cantonese), level of education (no formal education, primary school, secondary school or higher), body mass index (kg/m²), total energy intake (kcal/day), baseline history of diabetes (yes, no), tea intake (none, monthly, weekly, daily) and energy-adjusted daily intake of protein, cholesterol, marine omega-3, omega-6 fatty acids, vitamin A and vitamin C (quartiles), smoking status (never, former, current), cigarettes per day (non-current, ≤6, 7–12, 13–22, 23–32, 33–42, 43+), years of smoking (non-current smokers, ≤19 years, 20–39 years, 40+ years).