Social Inequality in Walking Speed in Early Old Age in the Whitehall II Study
Social Inequality in Walking Speed in Early Old Age in the Whitehall II Study
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DOI：
10.1093/gerona/glp078
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发表时间：
2009-10-01
影响因子：
5.1
通讯作者：
Marmot, Michael
中科院分区：
文献类型：
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作者：
Brunner, Eric;Shipley, Martin;Marmot, Michael
通过计时8英尺(2.44米)测试，对6,345名平均年龄为61.1(SD 6.0)的人进行了步行速度测量。目前或最后为人所知的公务员就业级别定义了社会经济地位。平均步行速度男性为1.36(SD 0.29)米/S，女性为1.21(SD 0.30)。经年龄和种族调整后的平均步行速度在最高就业级别比最低就业级别高出约13%。根据相对不平等指数(RII)，不同社会等级之间步行速度的差异男性为0.15米/S(95%可信区间[CI]0.12-0.18)，女性为0.17米/S(0.12-0.22)，与年龄相关的男性差异为18.7岁(13.6-23.8岁)，女性为14.9岁(9.9-19.9岁)。根据年龄、性别和种族调整后的慢走速度(性别四分位数最低的Logistic模型)的RII为3.40(2.64-4.36)。对步行速度的社会梯度的解释因素包括短小的36项身体机能、劳动力市场状况、经济不安全感、身高和体重指数。人口、心理社会、行为、生物和健康因素加在一起，造成了社会步行速度不平等的40%。社会步行速度不平等在老年早期非常严重，反映了身体健康直接影响之外的许多因素。
We investigated social inequalities in walking speed in early old age.Walking speed was measured by timed 8-ft (2.44 m) test in 6,345 individuals, with mean age of 61.1 (SD 6.0) years. Current or last known civil service employment grade defined socioeconomic position.Mean walking speed was 1.36 (SD 0.29) m/s in men and 1.21 (SD 0.30) in women. Average age- and ethnicity-adjusted walking speed was approximately 13% higher in the highest employment grade compared with the lowest. Based on the relative index of inequality (RII), the difference in walking speed across the social hierarchy was 0.15 m/s (95% confidence interval [CI] 0.12-0.18) in men and 0.17 m/s (0.12-0.22) in women, corresponding to an age-related difference of 18.7 (13.6-23.8) years in men and 14.9 (9.9-19.9) years in women. The RII for slow walking speed (logistic model for lowest sex-specific quartile vs others) adjusted for age, sex, and ethnicity was 3.40 (2.64-4.36). Explanatory factors for the social gradient in walking speed included Short-Form 36 physical functioning, labor market status, financial insecurity, height, and body mass index. Demographic, psychosocial, behavioral, biologic, and health factors in combination accounted for 40% of social inequality in walking speed.Social inequality in walking speed is substantial in early old age and reflects many factors beyond the direct effects of physical health.