. 2009 Apr;18(4):547–552. doi: 10.1089/jwh.2007.0580

Table 2.

Adjusted Odds Ratios and 95% Confidence Intervals for Clinical Breast Examinations (CBEs) in Past 5 Years (1990–1994) in DES-Exposed and Unexposed Women Aged 40–49

	DES exposed (n = 563)		DES unexposed (n = 232)
	n	%	n	%	Adjusted OR^a,b	95% CI^a	p for trend^c
Number of CBEs in past 5 years^d
Missing^e	4	0.7	2	0.9
None	18	3	8	3
Once	46	8	22	10
2–3 times^f	149	27	60	26	1.00	Referent
4–5 times^g	255	45	116	50	0.97	0.68–1.37
>5 times^h	91	16	24	10	1.67	0.95–2.96	0.39

Reported history of BBD^a(n = 252)
	DES exposed (n = 173)		DES unexposed (n = 79)
	n	%	n	%	Adjusted OR^a,b	95% CI^a	p for trend^c
Number of CBEs in past 5 years^d
None	1	0.6	2	3
Once	11	6	6	8
2–3 times^f	37	21	15	19	1.00	Referent
4–5 times^g	86	50	45	57	0.87	0.44–1.70
>5 times^h	38	22	11	14	0.83	0.29–2.35	0.52

Reported No history of BBD^a(n = 533)
	DES exposed (n = 382)		DES unexposed (n = 151)
	n	%	n	%	Adjusted OR^a,b	95% CI^a	p for trend^c
Number of CBEs in past 5 years^d
None	17	5	6	4
Once	35	9	16	11
2–3 times^f	110	29	45	30	1.00	Referent
4–5 times^g	168	44	71	47	1.08	0.70–1.65
>5 times^h	52	14	13	9	2.20	1.04–4.67	0.36

^{^a}

OR, odds ratio; CI, confidence interval; BBD, benign breast disease.

^{^b}

Adjusted for age (continuous variable), education, marital status, and site.

^{^c}

The p value (two-sided) for trend included all five outcome frequency categories; none of the frequency categories were combined for the trend test.

^{^d}

Five years [(1994–birth year) − 5] were subtracted from the current questionnaire age to put the women's respective screening age in the proper context of the previous 5 years: no women >age 50 were present in the dataset, and only 20% were aged 40–49.

^{^e}

Missing values indicate a nonresponse to the question regarding number of CBEs in the past 5 years.

^{^f}

Categories (none, once, and 2–3 times) were combined to form the reference category.

^{^g}

The category 4–5 times was compared to the reference group and defined as compliant for CBE screening for this age group.

^{^h}

The category >5 times was compared to the reference group and defined as exceeding recommendations for CBE screening for this age group.