FREQ过程产生一维到n维频数表和交叉(列联) 表。对于二维表PROC FREQ 计算检验和属性的度量。对于n维表PROC FREQ 做分层分析、计算层内统计量, 交叉、分层、频数和统计量同样能输出到SAS数据集。
PROC FREQ能计算一维频数表相等比率、特殊比率或二项式比率统计量检验。 PROC FREQ 能计算任何分层变量列联表在两个分类变量调整之间关系检验的各种统计量。 PROC FREQ 自动显示输出在报告中，并且也能存输出在SAS数据集中。
某些配对变量，可以检验任何变量之间关系的存在或相关的强度。如果关系存在的话，决定计算卡方检验、估计相关的强度， 等
∙卡方检验和度量
∙属性的度量
∙风险 (二项式比率) 和2×2 表的风险差
∙2×2 表比数比和相对危险
∙趋势检验
∙检验和一致性的度量
∙CMH统计量
The following statements are available in PROC FREQ.
PROC FREQ < options > ;
BY variables ;
EXACT statistic-options < / computation-options > ;
OUTPUT < OUT=SAS-data-set > options ;
TABLES requests < / options > ;
TEST options ;
WEIGHT variable < / option > ;
EXACT指定统计量的确切检验或置信限，
Option
Exact Statistics Computed
AGREE
2 ×2表的 McNemar's 检验, 简单的kappa系数, 和加权的kappa系数
BINOMIAL
一维表的二项式比例检验
CHISQ
variable used in lambda
一维表的拟合优度检验; 二维表的Pearson 卡方,似然比卡方, 和 Mantel-Haenszel卡方检验
COMOR
h ×2 ×2表公共的OR置信限; 公共的OR检验
FISHER
Fisher's 精确检验
JT
Jonckheere-Terpstra 检验
KAPPA
简单的kappa系数检验
LRCHI
似然比卡方检验
MCNEM
McNemar's检验
MEASURES
Pearson 相关和 Spearman相关检验, 和2 ×2表OR置信限
MHCHI
Mantel-Haenszel卡方检验
OR
2 ×2 表OR值的置信限
PCHI
Pearson卡方检验
PCORR
Pearson相关系数检验
SCORR
Spearman相关系数检验
TREND
Cochran-Armitage趋势检验
WTKAP
加权kappa系数检验
Computation-Options：
ALPHA= 指定Monte Carlo p-值估计置信限的水平。ALPHA= 值必须在0到1之间，默认值是0.01。
MAXTIME=value
指定计算精确p-值的最大时间。
MC
要求 Monte Carlo精确p-值估计代替直接p-值计算。
N=n
指定Monte Carlo估计样本数
POINT
要求检验统计量的精确点概率。
SEED=number
为Monte Carlo估计随机数发生指定初始种子。
OUTPUT < OUT= SAS-data-set > options ;
OUTPUT Statement Options and Required TABLES Statement Options
Option
Output Data Set Statistics
Required TABLES Statement Option
AGREE
McNemar's test for 2 ×2 tables, simple kappa coefficient, and weighted kappa coefficient; for square tables with more than two response categories, Bowker's test of symmetry; for multiple strata, overall simple and weighted kappa statistics, and tests for equal kappas among strata; for multiple strata with two response categories, Cochran's Q test
AGREE
AJCHI
2 ×2表连续校正χ2
ALL or CHISQ
ALL
all statistics under CHISQ, MEASURES, and CMH, and the number of nonmissing subjects
ALL
BDCHI
Breslow-Day test
ALL or CMH or CMH1 or CMH2
BIN | BINOMIAL
for one-way tables, binomial proportion statistics
BINOMIAL
CHISQ
chi-square goodness-of-fit test for one-way tables; for two-way tables, Pearson chi-square, likelihood-ratio chi-square, continuity-adjusted chi-square for 2 ×2 tables, Mantel-Haenszel chi-square, Fisher's exact test for 2 ×2 tables, phi coefficient, contingency coefficient, and Cramer's V
ALL or CHISQ
CMH
Cochran-Mantel-Haenszel correlation, row mean scores (ANOVA), and general association statistics; for 2 ×2 tables, logit and Mantel-Haenszel adjusted odds ratios, relative risks, and Breslow-Day test
ALL or CMH
CMH1
same as CMH, but excludes general association and row mean scores (ANOVA) statistics
ALL or CMH or CMH1
CMH2
same as CMH, but excludes the general association statistic
ALL or CMH or CMH2
CMHCOR
Cochran-Mantel-Haenszel correlation statistic
ALL or CMH or CMH1 or CMH2
CMHGA
Cochran-Mantel-Haenszel general association statistic
ALL or CMH
CMHRMS
Cochran-Mantel-Haenszel row mean scores (ANOVA) statistic
ALL or CMH or CMH2
COCHQ
Cochran's Q
AGREE
CONTGY
contingency coefficient
ALL or CHISQ
CRAMV
Cramer's V
ALL or CHISQ
EQKAP
test for equal simple kappas
AGREE
EQWKP
test for equal weighted kappas
AGREE
FISHER | EXACT
Fisher's exact test
ALL or CHISQ *
GAMMA
gamma
ALL or MEASURES
JT
Jonckheere-Terpstra test
JT
KAPPA
simple kappa coefficient
AGREE
KENTB
Kendall's tau-b
ALL or MEASURES
LAMCR
lambda asymmetric (C|R)
ALL or MEASURES
LAMDAS
lambda symmetric
ALL or MEASURES
LAMRC
lambda asymmetric (R|C)
ALL or MEASURES
LGOR
adjusted logit odds ratio
ALL or CMH or CMH1 or CMH2
LGRRC1
adjusted column 1 logit relative risk
ALL or CMH or CMH1 or CMH2
LGRRC2
adjusted column 2 logit relative risk
ALL or CMH or CMH1 or CMH2
LRCHI
likelihood-ratio chi-square
ALL or CHISQ
MCNEM
McNemar's test
AGREE
MEASURES
gamma, Kendall's tau-b, Stuart's tau-c, Somers' D (C|R), Somers' D (R|C), Pearson correlation coefficient, Spearman correlation coefficient, lambda asymmetric (C|R), lambda asymmetric (R|C), lambda symmetric, uncertainty coefficient (C|R), uncertainty coefficient (R|C), and symmetric uncertainty coefficient; for 2 ×2 tables, odds ratio and relative risks
ALL or MEASURES
MHCHI
Mantel-Haenszel chi-square
ALL or CHISQ
MHOR
adjusted Mantel-Haenszel odds ratio
ALL or CMH or CMH1 or CMH2
MHRRC1
adjusted column 1 Mantel-Haenszel relative risk
ALL or CMH or CMH1 or CMH2
MHRRC2
adjusted column 2 Mantel-Haenszel relative risk
ALL or CMH or CMH1 or CMH2
N
number of nonmissing subjects for the stratum
 
NMISS
number of missing subjects for the stratum
 
OR
odds ratio
ALL or MEASURES or RELRISK
PCHI
chi-square goodness-of-fit test for one-way tables; for two-way tables, Pearson chi-square
ALL or CHISQ

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