Table 1.  Effect of counselling on intake of fruit and vegetables and biomarkers (complete sample) Group (n) Baseline (SD) Unadjusted change over 12 months (95% CI) Adjusted change over 12 months (95% CI) Adjusted difference in change (95% CI) P value for adjusted difference Portions/day   Nutritional (135) 3.67 (2.00) 0.99 (0.63 to 1.34) 0.87 (0.50 to 1.25) 0.62 (0.09 to 1.13)  0.021   Behavioural (136) 3.60 (1.81) 1.44 (1.09 to 1.80)  1.49 (1.12 to 1.86)* Five a day (%)   Nutritional (135) 26.7% 28.7% (19.9 to 37.6) 26.8% (17.6 to 36.0) 15.4% (2.52 to 28.3)  0.019   Behavioural (136) 21.3% 40.2% (31.3 to 49.0) 42.2% (33.1 to 51.2)*   Carotene (µmol/l)   Nutritional (134) 0.92 (0.68) 1.06 (0.94 to 1.21) 1.04 (0.94 to 1.15)  0.16 (0.001 to 1.34) 0.05   Behavioural (134) 0.90 (0.62) 1.22 (1.08 to 1.39)  1.20 (1.08 to 1.33)   Tocopherol (µmol/l)   Nutritional (132) 27.4 (10.9) 7.28 (5.25 to 9.31) 7.30 (5.58 to 9.02)  1.52 (0.91 to 3.95) 0.22   Behavioural (134) 25.6 (11.3) 8.87 (6.85 to 10.9)  8.81 (7.12 to 10.5) Ascorbic acid (µmol/l)   Nutritional (131) 78.0 (33.0)  0.12 (4.89 to 5.12)  0.51 (4.00 to 5.01) 4.57 (10.9 to 1.80) 0.16   Behavioural (133) 75.6 (33.3) 2.80 (7.76 to 2.17) 4.06 (8.52 to 0.41) Potassium excretion (mmol/24h)   Nutritional (114) 75.0 (27.6) 0.63 (4.04 to 2.77) 0.27 (3.52 to 2.98)  0.46 (4.22 to 5.13) 0.85   Behavioural (107) 73.0 (26.0)  0.19 (3.33 to 3.70)   0.19 (3.14 to 3.52) Potassium/creatinine ratio   Nutritional (114) 6.69 (2.32) 0.24 (0.53 to 0.03) 0.20 (0.48 to 0.07)  0.13 (0.27 to 0.53) 0.52   Behavioural (107) 6.34 (2.26) 0.05 (0.34 to 0.24)  0.07 (0.35 to 0.21) * Adjusted for sex, age, ethnicity, income, smoking, and baseline stage of change. Adjusted for sex, age, ethnicity, income, smoking, body mass index, and baseline level. Adjusted for sex, age, ethnicity, income, smoking, body mass index, baseline level, and vitamin supplements.