Reference	Objective	Design	Evidence
Hak et al. [231]	To determine prognostic factors for complications of LRTI among elderly patients in primary care	RCS	4A+
Seppa et al. [232]	To determine which information can be used to assess the severity of LRTI in primary care	PCS	3A+
Bauer et al. [233]	To validate the CURB, CRB and CRB‐65 scores for the prediction of death from community‐acquired pneumonia (CAP)	PCS	3A+
Bont et al. [234]	To study predictors of complications of lower respiratory tract infections in elderly patients	PCS	3A+
Bont et al. [235]	To validate the CRB‐65 rule for elderly patients in primary care	PCS	3A+
Bont [236]	To develop a prediction model for lower respiratory tract infections in elderly patients in primary care	PCS	3A+