Izawa Kazuhiro P, Watanabe Satoshi, Hirano Yasuyuki, Matsushima Shinya, Suzuki Tomohiro, Oka Koichiro, Kida Keisuke, Suzuki Kengo, Osada Naohiko, Omiya Kazuto, Brubaker Peter H, Shimizu Hiroyuki, Akashi Yoshihiro J
From the Graduate School of Health Sciences, Kobe University, Kobe (KPI); Department of Rehabilitation Medicine, St. Marianna University School of Medicine Hospital, Kawasaki (SW, SM, TS); Department of Physical Therapy, Tokushima Bunri University, Tokushima (YH); Faculty of Sport Sciences, Waseda University, Tokorozawa (K. Oka); Division of Cardiology, St. Marianna University Toyoko Hospital, Kawasaki (NO); Division of Cardiology, St. Marianna University Yokohama-city Seibu Hospital, Yokohama, Japan (K. Omiya); Department of Health and Exercise Science, Wake Forest University, Winston-Salem, USA (PHB); Department of Orthopedic Surgery (HS); and Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan (KK, KS, YJA).
Medicine (Baltimore). 2015 Mar;94(11):e623. doi: 10.1097/MD.0000000000000623.
Maximum gait speed and physical activity (PA) relate to mortality and morbidity, but little is known about gender-related differences in these factors in elderly hospitalized cardiac inpatients. This study aimed to determine differences in maximum gait speed and daily measured PA based on sex and the relationship between these measures in elderly cardiac inpatients.A consecutive 268 elderly Japanese cardiac inpatients (mean age, 73.3 years) were enrolled and divided by sex into female (n = 75, 28%) and male (n = 193, 72%) groups. Patient characteristics and maximum gait speed, average step count, and PA energy expenditure (PAEE) in kilocalorie per day for 2 days assessed by accelerometer were compared between groups.Gait speed correlated positively with in-hospital PA measured by average daily step count (r = 0.46, P < 0.001) and average daily PAEE (r = 0.47, P < 0.001) in all patients. After adjustment for left ventricular ejection fraction, step counts and PAEE were significantly lower in females than males (2651.35 ± 1889.92 vs 4037.33 ± 1866.81 steps, P < 0.001; 52.74 ± 51.98 vs 99.33 ± 51.40 kcal, P < 0.001), respectively.Maximum gait speed was slower and PA lower in elderly female versus male inpatients. Minimum gait speed and step count values in this study might be minimum target values for elderly male and female Japanese cardiac inpatients.
最大步速和身体活动（PA）与死亡率和发病率相关，但对于老年住院心脏病患者在这些因素上的性别差异知之甚少。本研究旨在确定老年心脏病患者基于性别的最大步速和每日测量的PA差异以及这些指标之间的关系。
连续纳入268名老年日本心脏病患者（平均年龄73.3岁），并按性别分为女性组（n = 75，28%）和男性组（n = 193，72%）。比较两组患者的特征、最大步速、平均步数以及通过加速度计评估的2天内每天的PA能量消耗（PAEE，千卡）。
在所有患者中，步速与通过平均每日步数测量的住院期间PA呈正相关（r = 0.46，P < 0.001），与平均每日PAEE也呈正相关（r = 0.47，P < 0.001）。在调整左心室射血分数后，女性的步数和PAEE显著低于男性（分别为2651.35±1889.92步对4037.33±1866.81步，P < 0.001；52.74±51.98千卡对99.33±51.40千卡，P < 0.001）。
老年女性住院患者的最大步速较慢，PA较低。本研究中的最小步速和步数可能是老年日本男性和女性心脏病患者的最小目标值。
