Fig. 3.

Population attributable fractions (PAF, %) indicating proportional risk reductions in coronary heart disease (CHD) that would be observed if ≥2h/day of TV viewing or computer use were reduced to ≤1h/day of TV viewing or computer use. Cox regression models using age as the underlying timescale were adjusted for sex, body mass index (weight in kilograms/height in meters squared), smoking status (never, previous, current), employment (unemployed, employed), Townsend Deprivation Index (a numerical deprivation score generated based on employment, car ownership, home ownership and household overcrowding according to postcode of participants’ home address), alcohol consumption (never, previous, currently <3 times/week, currently ≥3 times/week), salt-adding behaviour (never/rarely, sometimes, usually, always), oily fish consumption (never, <once/week, once/week, >once/week), coffee intake (cups/day), fruit and vegetable intake (a composite score generated based on intake of fresh/dried fruit and intake of raw/cooked vegetable ranging from 0 to 4), processed/red meat intake (days/week), hypertension medication use, cholesterol-lowering medication use, glucose-lowering medication use, sleep (≤5, 6, 7, 8 and ≥9h/day), moderate-to-vigorous physical activity (minutes/day), polygenic risk scores, genotype array type and first ten principal components of genetic ancestry, with mutual adjustment of the two exposure variables (TV viewing and computer use). Error bars indicate 95% confidence intervals