Table 1.

Characteristics of cases and matched controls after breast cancer therapy in 1998–2008.

Characteristics	Cases		Controls
	N = 494	100 (%c)	N = 988	100 (%c)
Year of breast cancer diagnosis
1998–2000	62	12.55	129	13.06
2001–2003	94	19.03	182	18.42
2004–2006	213	43.12	441	44.64
2007–2008	125	25.30	236	23.89
Age at breast cancer diagnosis
Mean	63.14	/	63.10	/
SDa	11.93	/	11.85	/
Laterality
Left	264	53.44	540	54.66
Right	230	46.56	448	45.34
T-stage
1	267	54.05	572	57.89
2	151	30.57	307	31.07
3	21	4.25	29	2.94
4	26	5.26	40	4.05
In situ	21	4.25	33	3.34
Unknown	8	1.62	7	0.71
N-stage
0	311	62.96	586	59.31
1	111	22.47	248	25.10
2	34	6.88	77	7.79
3	15	3.04	45	4.55
X	23	4.66	32	3.24
BMIb
<25.0	207	41.90	411	41.60
≥25.0	253	51.21	509	51.52
Unknown	34	6.88	68	6.88
History of cardiac diseased
Yes	84	17.00	168	17.00
No/unknown	410	83.00	820	83.00
Chemotherapy
Yes	215	43.52	398	40.28
No	276	55.87	576	58.30
Unknown	3	0.61	14	1.42
Endocrine therapy
Yes	382	77.33	745	75.40
No	98	19.84	201	20.34
Unknown	14	2.83	42	4.25
Type of surgery
Nonee	3	0.61	1	0.10
Breast conserving	425	86.23	843	85.32
Mastectomy	66	13.36	144	14.57
Unknown	0	0.00	0	0.00

^aSD: Standard deviation.

^bBMI: Body Mass Index.

^cPercentages may not add up to a total of 100 due to rounding.

^dHistory of cardiac disease at the time of breast cancer diagnosis, including history of cardiac infarction, coronary heart disease, angina pectoris, NYHA≥3, dysrhythmia, vitium cordis or use of a pacemaker.

^ePatients who did not receive breast conserving surgery or mastectomy during their breast cancer therapy.