Study ID Country Study size Sex(Male/Female) Age(years) (allocated numbers in arms)
Loeb 2008-09 Canada 446 26/420 36.15±10.59 Targeted wearing surgical mask (225) vs Targeted wearing N95 Respirators masks (221)
MacIntyre 2008-09 China 1441 N/A N/A Continuous wearing N95 Respirators masks (949) vs Continuous wearing surgical mask (492) vs Control (481)
MacIntyre 2008-09 China 1485 142/1343 32.85±9.32 Continuous wearing surgical mask (492) vs Continuous wearing N95 Respirators masks (949)
MacIntyre 2009-10 China 1669 243/1426 33.1±9.61 Continuous wearing surgical mask(572) vs Targeted wearing N95 Respirators masks(516) vs Continuous wearing N95 Respirators masks N95 Respirator(581)
MacIntyre 2011 Vietnam 1607 357/1250 35.65±10.39 Continuous wearing sugical masks (580) vs Continuous wearing cloth mask (569) vs Control(458)
Radonovich 2011-15 America 5180 798/4382 43±11.55 Targeted wearing N95 Respirator(2512)vs Targeted wearing surgical Mask(2668)