共 64 条
[1]
Aday L A, 1974, Health Serv Res, V9, P208
[3]
BAKER DW, 1994, JAMA-J AM MED ASSOC, P1909
[6]
*CDCP, 1995, MMWR-MORBID MORTAL W, V47, P277
[8]
Cohen J., 1988, POWERSTATISTICALSCIE, DOI 10.4324/9780203771587
[9]
Cunningham PJ, 1999, HEALTH SERV RES, V34, P255