Average age of MPs
* NCP: Samyukta Janamorcha from 1991 to 1999
** CPN Maoist and Janamorcha in 2008
*** United CPN Maoist in 2013, CPN Maoist Center in 2017
**** Maoist Center and Unified Socialist in 2022
^ RPP: RPP (Chanda) and RPP (Thapa) in 1991,
^^ RPP, RPP Nepal and Rastriya Janshakti Party in 2008
^^^ 2013 and 2017 RPP and RPP Nepal
$ Madhes Based Parties: Nepal Sadbhavana Party until 1999
Various groups including Madhesi Jan Adhikar Forum, Terai Madhes Loktantrik Party, Sadbhavana Party and Sadbhavana Party (Anandi Devi) in 2008, 2013, 2017 and 2022
** CPN Maoist and Janamorcha in 2008
*** United CPN Maoist in 2013, CPN Maoist Center in 2017
**** Maoist Center and Unified Socialist in 2022
^ RPP: RPP (Chanda) and RPP (Thapa) in 1991,
^^ RPP, RPP Nepal and Rastriya Janshakti Party in 2008
^^^ 2013 and 2017 RPP and RPP Nepal
$ Madhes Based Parties: Nepal Sadbhavana Party until 1999
Various groups including Madhesi Jan Adhikar Forum, Terai Madhes Loktantrik Party, Sadbhavana Party and Sadbhavana Party (Anandi Devi) in 2008, 2013, 2017 and 2022
