Table 4.

Summary of reviewed exhaled nitric oxide values (ppb) for the asthma population: adults (A), children (B).

First author	Date	n	Mean	Standard deviation	Standard error	Median	Interquartile range
(A)
Kharitonov [51]	2003	59	32.3		25.9
Olin [61]	2004	228	24.7
Smith [62]	2004	47	52	34
Berry [15]	2005	566	6.7	log 0.65
Nguyen [63]	2005	44				17	9.5–41.4
Olin [74]	2006	2200				19.9	14.6–31.4
Gruffydd-Jones [67]	2007	37				31.2	11.5–61.9
Maniscalco [80]	2007	14	32.9	6.4
Shaw [71]	2007	118				29.2	14.0 – 61.0
Travers [46]	2007	528	25	15.2
Zietkowski [78]	2007	26	98.9	55.37
Kerckx [79]	2008	21	46.5	22.1
Kovesi [45]	2008	657				20	14–31
Michils [48]	2008	341	32.9
Shannon [72]	2008	50	13.3	8.5
(B)
Warke [59]	2002	71				24.3	10.5–66.5
Beck-Ripp [38]	2002	46	14.8	1.9
Malmberg [60]	2003	96	22.1	2.6
Pijnenburg [36]	2005	40	11.2	2.05
Pjnenburg [65]	2005	85	26.4
Spergel [49]	2005	30	44	49
Zacharasiewicz [54]	2005	40				21.5	8.5–33
Fritsch [66]	2006	47				34.6	17.5–58.6
Gruffydd-Jones [67]	2007	37				55.3	11.6–102.1
Montuschi [69]	2007	14				42.6	28–66.4
Robroeks [70]	2007	114	15.4		1.37