Table 2.

Supplement use before and during breast cancer treatment

Supplement use before diagnosis	Supplement use during treatment		Total	P a
	No	Yes
	N (%)	N (%)	N (%)
Multivitamin
No	510 (41.2)	133 (10.7)	643 (51.9)	0.0009
Yes	193 (15.6)	402 (32.5)	595 (48.1)
Total	703 (56.8)	535 (43.2)	1,238 (100)
Vitamin C
No	931 (75.2)	62 (5.0)	993 (80.2)	<.0001
Yes	160 (12.9)	85 (6.9)	245 (19.8)
Total	1,091 (88.1)	147 (11.9)	1,238 (100)
Vitamin D
No	795 (64.2)	155 (12.5)	950 (76.7)	0.1229
Yes	129 (10.4)	160 (12.9)	289 (23.3)
Total	924 (74.6)	315 (25.4)	1,239 (100)
Vitamin E
No	1,005 (81.2)	42 (3.4)	1,047 (84.6)	<.0001
Yes	154 (12.4)	37 (3.0)	191 (15.4)
Total	1,159 (93.6)	79 (6.4)	1,238 (100)
Vitamin B6
No	933 (75.4)	186 (15.0)	1,119 (90.4)	<.0001
Yes	69 (5.6)	50 (4.0)	119 (9.6)
Total	1,002 (80.9)	236 (19.1)	1238 (100)
Folic Acid
No	1,051 (84.8)	62 (5.0)	1,113 (89.8)	0.0231
Yes	90 (7.3)	37 (3.0)	127 (10.2)
Total	1,141 (92)	99 (8)	1,240 (100)
Vitamin B12
No	999 (80.5)	82 (6.6)	1,081 (87.1)	0.2622
Yes	97 (7.8)	63 (5.1)	160 (12.9)
Total	1,096 (88.3)	145 (11.7)	1,241 (100)
Calcium
No	695 (56.0)	119 (9.6)	814 (65.6)	<.0001
Yes	198 (16.0)	229 (18.4)	427 (34.4)
Total	893 (72)	348 (28)	1,241 (100)
Fish oil, EPA, omega-3, flaxseed or cod liver oil
No	907 (73.5)	47 (3.8)	954 (77.3)	<.0001
Yes	172 (13.9)	108 (8.8)	280 (22.7)
Total	1,079 (87.4)	155 (12.6)	1,234 (100)
Glucosamine
No	1,059 (85.7)	18 (1.5)	1,077 (87.1)	<.0001
Yes	97 (7.8)	62 (5.0)	159 (12.9)
Total	1,156 (93.5)	80 (6.5)	1,236 (100)

^aMcNemar’s test comparing the differences in use before and during treatment