Table 4.

The strength of evidence for recommending nutritional supplement for prevention or to slow down the progression of AMD

Patient scenarios	Prevention (opt)	Prevention (ophth)	p-Value	Slowing down the progression (opt)	Slowing down the progression (ophth)	p-Value
High strength	40/267 (15%)	0/41 (0%)	<0.0001	45/262 (17%)	2/40 (5%)	<0.0001
Moderate strength	158/267 (59%)	4/41 (10%)		158/262 (60%)	5/40 (13%)
Low strength	59/267 (22%)	27/41 (66%)		54/262 (21%)	24/40 (60%)
Very low strength	10/267 (4%)	10/41 (24%)		5/262 (2%)	9/40 (23%)

Abbreviations: Opt, optometrists; ophth, ophthalmologists; AMD, age-related macular degeneration.