Study | Reason for exclusion |
---|---|
Ackerhans 1994 | Participants had acute rhinitis |
Anderson 1956 | Not a RCT |
Anonymous 1975 | Not a RCT |
Ashe 1968 | Participants had nasal obstruction due to various reasons including allergy |
Bailey 1969 | Participants had nasal obstruction due to various reasons including allergy |
Bende 1984 | Participants had nasal obstruction, not due to common cold |
Bende 1985 | Nasal stuffiness was the only inclusion criterion, hence it is not clear for how long participants experienced nasal congestion and whether this was due to the common cold |
Broms 1982 | Participants suffered from nasal obstruction for more than 6 months |
Castellano 2002 | Participants had reduced airflow, which was not necessarily due to the common cold |
Cohen 1977 | Combination therapy |
Connell 1969 | Some of the patients had allergic rhinitis |
De Paula Neves 1966 | Combination therapy |
Dorn 2003 | Trial was not placebo‐controlled |
Fox 1967 | Trial was not placebo‐controlled |
Hummel 1998 | None of pre‐specified outcome measures were reported |
Katrana 1956 | Not a RCT |
McElhenney 1966 | Not a RCT |
Meurman 1975 | Trial was not placebo‐controlled |
Pritchard 2014 | Participants with hay fever were also included |
Rumiantsev 1993 | Combination therapy |
Smith 1999 | Not an RCT |
Tzachev 2002 | Participants had allergic rhinitis |
Weisberg 1966 | Combination therapy |
Winther 1983 | Nasal airway resistance was not measured; the weight of nasal discharge was measured |
Zumpft 1975 | Participants had allergic rhinitis |
RCT: Randomised controlled trial