5Sandier RS,Jordan MC, Shelton BJ. Demographic and dietary determinants of constipation.stipation in the US population [J]. Am J Public Health,1990,80(2):185-189.
6Campbell A J, Busby WJ, Horwath CC. Factors associated with constipation in a community based sample of people aged 70 years and over[J]. J Epidemiol Community Health, 1993,47(1): 23-26.
7Towers AL, Burgio KL, Locher JL, et al. Constipation in elderly: In fluenee of dietary psychological and physiological factors [J]. J Am Geriatr Soc, 1994,42(7):701-706.
8Wong ML, Wee S, Pin CH, et al. Sociodemographie and life-style factors associated with constipation in an elderly Asian community[J].Am J Gastroenterol, 1999,94(5): 1283-1291.
9Meiring PJ, Joubert G, Constipation in elderly patients attending a polyclinic[J]. S Afr Med J, 1998,88(7):888-890.
10Wilson JA. Constipation in the elderly[J]. Clin Geriatr Med, 1999,15(3):499-510.
