Target nail attribute	1 week			2 weeks			4 weeks
	n	%	95% CI^a	n	%	95% CI^a	n	%	95% CI^a
Thickening	18	28	17 to 40	34	52	40 to 65	45	69	57 to 80
Discoloration	36	55	43 to 68	45	69	57 to 80	47	72	60 to 83
Brittleness	19	29	19 to 42	30	46	34 to 59	33	51	38 to 63
Softness	23	35	24 to 48	31	48	35 to 60	41	63	50 to 75