Table 1.

Characteristics of randomized controlled studies included into efficacy analysis of carrageenan nasal spray in common cold

Trial	Number of patients	Population	Main inclusion criteria	Duration of nasal application of carrageenan or placebo	Outcomes	Follow-up
Fazekas T. et al. 2012 [14]	213	1-18 years	Duration of symptoms since 36 h	7 days 3 times per day	Symptoms severity; number of days without symptoms; viral load	21d
Ludwig M. et al. 2013 [15]	211	≥18 years	Duration of symptoms since 48 h	7 days 3 times per day	Duration of disease; symptoms severity; viral load	21d