. Author manuscript; available in PMC: 2012 Jul 18.

Published in final edited form as: Evid Based Child Health. 2011 Sep 8;6(5):1322–1339. doi: 10.1002/ebch.827

Table V.

Atopy (all ages and risk levels)

Comparison	Outcome	Number of participants (trials)	Risk ratio (95% confidence interval)	I² (%)
Exclusive breastfeeding for at least six months versus introduction of solids at three to six months	Positive skin prick test (unspecified) at six years	331 (1)	0.99 (0.73, 1.35)	--
Maternal antigen avoidance versus standard diet	Positive skin prick test to egg at two years	335 (2)	0.95 (0.52, 1.74)	0
Maternal antigen avoidance versus standard diet	Positive skin prick test to milk at two years	335 (2)	0.86 (0.16, 4.59)	13
Omega-3 fatty acid supplementation versus placebo	Positive skin prick test for “any atopy”^*	560 (2)	0.92 (0.76, 1.11)	NR
Omega-3 fatty acid supplementation versus placebo	Positive skin prick test to house dust mites	560 (2)	1.04 (0.81, 1.34)	NR

NR; not reported.

”Any atopy” refers to salmon, peanuts, cow’s milk, egg white, egg yolk, tuna, house dust mite, cockroach, cat, Alternaria alternate, rye grass and grass mix.