<s>
In	O
statistics	O
,	O
the	O
Newcastle	B-General_Concept
–	I-General_Concept
Ottawa	I-General_Concept
scale	I-General_Concept
is	O
a	O
tool	O
used	O
for	O
assessing	O
the	O
quality	O
of	O
non-randomized	O
studies	O
included	O
in	O
a	O
systematic	O
review	O
and/or	O
meta-analyses	O
.	O
</s>
