Table 3.

Accuracy of perceived 5-year risk of breast cancer among women attending the Bonnie Wells Wilson Mobile Mammography Program (Bonnie’s Bus Mammography Screening and Preventive Care Survey 2009–2011)

	5-year perceived relative risk of breast cancer
	Accurate		Inaccurate		Don’t know		P value	Cramer’s V
	N	%	N	%	N	%
All	433	100.00	257	100.00	379	100.00
Objective 5-year risk of breast cancer							<0.001*	0.628
≥1.66 % (high risk)	53	12.24	229	89.11	118	35.98
<1.66 % (low/average risk)	380	87.76	28	10.89	210	64.02
Age							0.336	0.079
40–49	129	29.79	90	35.02	122	32.36
50–59	179	41.34	113	43.97	132	35.01
60–69	106	24.48	48	18.68	102	27.06
≥70	19	4.39	6	2.33	51	5.57
Race							0.202	0.056
White	412	97.63	241	95.26	355	97.26
Non-white	10	2.37	12	4.74	10	2.74
Married							0.344	0.046
Yes	264	64.86	166	67.76	215	61.69
No	143	35.14	79	32.24	132	38.04
Annual family income							<0.001*	0.138
<$10,000	60	15.23	37	15.29	87	26.77
$10,000–$25,000	172	43.65	103	42.56	155	47.69
$25,000–$50,000	97	24.62	65	26.86	63	19.38
>$50,000	65	16.50	37	15.29	20	6.15
Highest level of education completed							<0.001*	0.178
< High school	28	6.65	25	9.88	67	18.66
High school or GED	221	52.49	99	39.13	205	57.10
> High school	172	40.86	129	50.99	87	24.23
Type of insurance							<0.001*	0.138
Private	86	21.83	59	25.54	43	12.76
State	52	13.20	30	12.99	25	7.42
Medicare	35	8.88	17	7.36	46	6.53
Medicaid	9	2.28	10	4.33	22	13.65
Other	27	6.85	13	5.63	28	8.31
Uninsured	185	46.95	102	44.16	173	51.34
Time since last mammogram							0.189	0.054
≤1 year	44	10.45	32	12.55	49	13.42
1–2 years	170	40.38	103	40.39	121	33.15
>2 years/never	207	49.17	120	47.06	195	53.42
Time since last clinical breast exam							0.692	0.033
≤1 year	191	45.15	112	44.80	164	45.56
1–2 years	145	34.28	77	30.80	111	30.83
>2 years/never	87	20.57	61	24.40	85	23.61
Time since last Pap test							0.853	0.026
≤1 year	158	37.80	97	38.04	133	36.84
1–2 years	133	31.82	86	33.73	111	30.75
>2 years/never	127	30.38	72	28.24	117	32.41
Seen OB/GYN in past year							0.707	0.028
Yes	131	35.79	86	38.74	105	35.47
No	235	64.21	136	61.26	191	64.53
Had a breast biopsy							<0.001*	0.207
Yes	41	9.47	73	28.63	53	14.13
No	329	90.53	182	71.37	322	85.87
Family history of breast cancer							<0.001*	0.186
Yes	43	9.93	71	27.63	64	17.78
No	390	90.07	186	72.37	296	82.22
Personal history of breast problems							<0.001*	0.136
Yes	35	8.10	47	18.58	35	9.36
No	397	91.90	206	81.42	339	90.64
Age at menarche							0.009	0.080
≤11	92	21.25	76	29.57	100	27.40
12–13	217	50.12	133	51.75	188	51.51
≥14	124	28.64	48	18.68	77	21.10
Age at first childbirth							<0.001*	0.261
<20	204	47.11	56	21.79	164	44.44
20–24	162	37.41	55	21.40	106	28.73
25–29	47	10.85	82	31.91	53	14.36
≥30	6	1.39	32	12.45	18	4.88
Nulliparous	14	3.23	32	12.45	28	7.59
Breast cancer knowledge							<0.001*	0.147
Less (<2)	27	6.57	16	6.78	66	18.54
Some (2–4)	103	25.06	64	27.12	110	30.90
More (4–6)	281	68.37	156	66.10	180	50.56
Anxiety about breast cancer							0.770	0.024
Less (<1)	358	94.21	200	94.79	308	93.33
More (1–3)	22	5.79	11	5.21	22	6.67
Perceived mammography benefits							0.080	0.061
Less (1–4)	18	4.31	8	3.28	27	7.52
Some (4–5)	22	5.26	15	6.15	25	6.96
More (5–7)	378	90.43	221	90.57	307	85.52
Perceived mammography barriers							0.190	0.081
Less (1–4)	345	81.56	197	81.40	283	78.39
Some (4–5)	41	9.69	33	13.64	32	8.86
More (5–7)	37	8.75	12	4.96	46	12.74

^*Significant after Bonferroni adjustment (P<0.0025)