<s>
In	O
statistics	O
,	O
the	O
Cochran	B-General_Concept
–	I-General_Concept
Mantel	I-General_Concept
–	I-General_Concept
Haenszel	I-General_Concept
test	I-General_Concept
(	O
CMH	O
)	O
is	O
a	O
test	O
used	O
in	O
the	O
analysis	O
of	O
stratified	O
or	O
matched	O
categorical	O
data	O
.	O
</s>
<s>
Unlike	O
the	O
McNemar	B-General_Concept
test	I-General_Concept
which	O
can	O
only	O
handle	O
pairs	O
,	O
the	O
CMH	O
test	O
handles	O
arbitrary	O
strata	O
size	O
.	O
</s>
<s>
Extensions	O
of	O
this	O
test	O
to	O
a	O
categorical	O
response	O
and/or	O
to	O
several	O
groups	O
are	O
commonly	O
called	O
Cochran	B-General_Concept
–	I-General_Concept
Mantel	I-General_Concept
–	I-General_Concept
Haenszel	I-General_Concept
statistics	I-General_Concept
.	O
</s>
<s>
The	O
McNemar	B-General_Concept
test	I-General_Concept
can	O
only	O
handle	O
pairs	O
.	O
</s>
<s>
The	O
CMH	O
test	O
is	O
a	O
generalization	O
of	O
the	O
McNemar	B-General_Concept
test	I-General_Concept
as	O
their	O
test	O
statistics	O
are	O
identical	O
when	O
each	O
stratum	O
shows	O
a	O
pair	O
.	O
</s>
<s>
When	O
the	O
CMH	O
test	O
can	O
be	O
applied	O
,	O
the	O
CMH	O
test	O
statistic	O
and	O
the	O
score	B-General_Concept
test	I-General_Concept
statistic	O
of	O
the	O
conditional	O
logistic	O
regression	O
are	O
identical	O
.	O
</s>
