研究案例

例1-1、例1-6、例1-8、例1-9、例1-12、例1-13.Andersen LB，Harro M，Sardinha LB，et al.Physical activity and clustered cardiovascular risk in children：a cross-sectional study（The European Youth Heart Study）［J］.Lancet，2006，368（9532）：299-304.

例1-2.Phillips M，Gleeson K，Hughes JM，et al.Volatile organic compounds in breath as markers of lung cancer：a cross-sectional study［J］.Lancet，1999，353（9168）：1930-1933.

例1-3、例1-10、例1-14.Zhang Y，Zeng C，Li H，et al.Relationship between cigarette smoking and radiographic knee osteoarthritis in Chinese population：a cross-sectional study［J］.Rheumatology International，2015，35（7）：1211-1217.

例1-4.Basenengquist K，Scruggs S，Jhingran A，et al.Physical activity and obesity in endometrial cancer survivors：associations with pain，fatigue，and physical functioning［J］.American Journal of Obstetrics &Gynecology，2009，200（3）：1-8.

例1-5.Sulaiman N，Albadawi S，Abusnana S，et al.Novel approach to systematic random sampling in population surveys：Lessons from the United Arab Emirates National Diabetes Study（UAEDIAB）［J］.Journal of Diabetes，2015，7（5）：642-648.

例1-7.O'Neill TW，Felsenberg D，Varlow J，et al.The prevalence of vertebral deformity in european men and women：the european vertebral osteoporosis study［J］.Journal of Bone & Mineral Research，1996，11（7）：1010-1018.

例1-11.Diehm C，Schuster A，Allenberg JR，et al.High prevalence of peripheral arterial disease and comorbidity in 6880 primary care patients：cross-sectional study［J］.Atherosclerosis，2004，172（1）：95-105. 0/CUGrdnmS6d6EJZ0nSj0S+0Mp/tbqcHr+e4Qq7CT2KEg7/i2eReKPt1eo5SZcyl