colspan
Column Span (NISO JATS table model)
Table attribute used to request horizontal spanning of more than one column. (This attribute is based on and
intended to be converted easily to the XHTML colspan attribute.)
Remarks
Example
... <tr> <th/> <th colspan="3" align="center" rowspan="1">Institutional care</th> <th align="left"/> <th colspan="2" align="center" rowspan="1"> Bed use (days)</th> </tr> ...