Michaëlsson Karl, Wolk Alicja, Melhus Håkan, Byberg Liisa
Am J Epidemiol. 2017 Mar 1;185(5):345-361. doi: 10.1093/aje/kww124.
High milk consumption might shorten life span through increased oxidative stress. We aimed to determine whether higher mortality rates with high milk consumption are modified by fruit and vegetable intake or total antioxidant intake (oxygen radical absorbance capacity). We used information from food frequency questionnaires completed by 61,420 women in a Swedish cohort (22,391 deaths from the 1987-1990 baseline onward), 36,714 women from a second survey (1997) of this cohort, and 45,280 Swedish men (15,478 deaths from the 1998 baseline onward). Compared with low consumption of milk (<1 glass/day) and high consumption of fruits/vegetables (≥5 servings/day), time-updated information revealed an adjusted hazard ratio for death of 2.79 (95% confidence interval (CI): 2.42, 3.21) in women who consumed ≥3 glasses of milk/day and <1 serving/day of fruit/vegetables and a hazard ratio of 1.60 (95% CI: 1.40, 1.82) in women who consumed the same amount of milk but ≥5 servings/day of fruits/vegetables. The same comparisons in men, based on a single food frequency questionnaire, displayed hazard ratios of 1.31 (95% CI: 1.14, 1.51) and 1.07 (95% CI: 0.97, 1.18), respectively. Total antioxidant consumption showed similar patterns as fruit/vegetable intakes. Dietary antioxidant intake, especially in women, seems to modify the elevated death rate associated with high milk consumption.
大量饮用牛奶可能会通过增加氧化应激来缩短寿命。我们旨在确定高牛奶摄入量导致的较高死亡率是否会因水果和蔬菜摄入量或总抗氧化剂摄入量(氧自由基吸收能力)而有所改变。我们使用了来自瑞典一个队列中61420名女性填写的食物频率问卷的信息(从1987 - 1990年基线起有22391人死亡)、该队列第二次调查(1997年)中的36714名女性以及45280名瑞典男性(从1998年基线起有15478人死亡)。与低牛奶摄入量(<1杯/天)和高水果/蔬菜摄入量(≥5份/天)相比,随时间更新的信息显示,每天饮用≥3杯牛奶且水果/蔬菜摄入量<1份/天的女性的死亡调整风险比为2.79(95%置信区间(CI):2.42, 3.21),而饮用相同牛奶量但水果/蔬菜摄入量≥5份/天的女性的风险比为1.60(95% CI:1.40, 1.82)。基于单一食物频率问卷对男性进行的相同比较显示,风险比分别为1.31(95% CI:1.14, 1.51)和1.07(95% CI:0.97, 1.18)。总抗氧化剂摄入量呈现出与水果/蔬菜摄入量相似的模式。膳食抗氧化剂摄入量,尤其是在女性中,似乎会改变与高牛奶摄入量相关的升高的死亡率。