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In the article cited above, the categories of the variable radiotherapy to chest in Tables 1 and 4 were listed incorrectly. The corrected tables appear below. The results on this variable should be interpreted according to the corrected tables.

Table 1. Comparisons of Characteristics Among Women With Breast Cancer According to the Receipt of Chemotherapy
 No. (Column %) of Cases
No Chemotherapy (n=14,986)Other Chemotherapy (n=3388)Anthracycline-Based Chemotherapy (n=1104)
No.%No.%No.%
Median age (range)75 (65-89)72 (65-89)70 (65-89)
Age, y      
 65-69357723.9122936.355850.5
 70-74393426.3106231.433830.6
 75-79356923.867820.016815.2
 80-84253516.93189.4322.9
 85-8913719.21013.080.7
Race/Ethnicity      
 Caucasian13,26188.5300788.794785.8
 African American8205.51925.7898.1
 Other9056.01895.6686.2
Marital status      
 Married628141.9168049.657952.5
 Unmarried820654.8162147.950145.4
 Unknown4993.3872.6242.2
Socioeconomic status      
 First quartile (high)378125.288226.030928.0
 Second quartile382425.581424.026223.7
 Third quartile383925.687825.927825.2
 Fourth quartile (low)331722.276922.723321.0
 Missing2251.5451.3222.0
Tumor stage      
 I812454.2110032.5645.8
 II398426.6139841.346942.5
 III6904.63379.929026.3
 IV7104.72988.819017.2
 Unstaged14789.92557.5918.2
Tumor size, cm      
 <1304020.338311.3393.5
 1-1.9535235.7103330.517115.5
 2-2.9264817.771321.021019.0
 3-3.910687.138011.213712.4
 ≥414669.854916.237033.5
 Missing14129.43309.717716.0
No. of positive lymph nodes      
 0 (negative)858957.3143642.412611.4
 18835.935310.4958.6
 2-35983.93169.311310.2
 4-94382.93109.218917.1
 10-512621.82196.519617.7
 Missing421628.175422.338534.9
Tumor grade      
 Well differentiated218214.62768.2413.7
 Moderately differentiated498333.3103530.626023.6
 Poorly differentiated350523.4122136.054649.5
 Unknown/Missing431628.885625.325723.3
Hormone receptor status      
 Positive991369.2206961.154449.3
 Negative13298.968420.231028.1
 Unknown374424.963518.725022.6
Comorbidity scores      
 011,51776.9272580.491683.0
 1262217.552715.615514.0
 ≥28475.71364.0332.9
Primary therapy      
 No cancer-directed surgery7905.31594.712211.1
 Breast conserving surgery610340.7112933.325523.1
 Mastectomy809354.0210062.072765.9
Radiotherapy to chest      
 No radiotherapy925861.8178652.740436.6
 Right-side279218.676822.732829.7
 Left-side291019.482024.236533.1
 Both sides or unknown260.2140.470.6
Year of diagnosis      
 1991239316.051715.31039.3
 1992217314.552915.612611.4
 1993211414.146513.71059.5
 1994205513.746013.614613.2
 1995208013.947213.916815.2
 1996203313.642412.519617.8
 1997213814.352115.426023.6
Total14,986100.03388100.01104100.0
Table 4. Hazard Ratio of Cardiac Toxicity in Patients Receiving Anthracycline Chemotherapy
Patient and Tumor CharacteristicsHazard Ratio* (95% CI) of Having Cardiac Toxicity
Congestive Heart FailureCardiomyopathyCardiac DysrhythmiaIschemic Heart DiseaseConduction Disorder
  1. CI indicates confidence interval.

  2. a

    Hazard ratio was adjusted for variables listed in the table, plus ethnicity, marital status, socioeconomic status, tumor stage, size, grade, number of positive lymph nodes, hormone receptor status, surgery, and year of diagnosis.

Chemotherapy     
 No chemotherapy1.00 (ref)1.00 (ref)1.00 (ref)1.00 (ref)1.00 (ref)
 Other chemotherapy1.03 (0.88-1.11)1.16 (0.97-1.39)1.06 (1.00-1.14)1.05 (0.99-1.13)0.97 (0.83-1.12)
 Anthracycline-containing  chemotherapy1.25 (1.07-1.46)1.95 (1.44-2.62)1.16 (1.02-1.33)0.99 (0.86-1.15)1.00 (0.73-1.37)
Age, y     
 65-691.001.001.001.001.00
 70-741.47 (1.35-1.60)1.06 (0.89-1.26)1.29 (1.21-1.38)1.25 (1.17-1.34)1.55 (1.33-1.80)
 75-792.23 (2.06-2.43)1.34 (1.11-1.62)1.68 (1.57-1.80)1.61 (1.50-1.73)1.98 (1.70-2.31)
 80-843.38 (3.08-3.70)1.46 (1.15-1.85)2.20 (2.02-2.38)2.13 (1.96-2.32)2.78 (2.33-3.32)
 85-894.96 (4.25-5.50)1.71 (1.23-2.39)3.16 (2.84-3.52)2.88 (2.58-3.22)3.93 (3.13-4.93)
Race/Ethnicity     
 Caucasians1.001.001.001.001.00
 African Americans1.34 (1.19-1.50)1.94 (1.51-2.49)1.31 (1.18-1.46)1.44 (1.30-1.60)1.48 (1.18-1.85)
 Others0.76 (0.67-0.87)0.94 (0.70-1.26)0.73 (0.66-0.82)0.87 (0.78-0.97)0.72 (0.56-0.93)
Comorbidity scores     
 01.001.001.001.001.00
 11.95 (1.82-2.08)1.66 (1.40-1.96)1.49 (1.40-1.58)1.82 (1.71-1.93)1.48 (1.30-1.69)
 ≥22.65 (2.38-2.95)2.25 (1.70-2.97)1.69 (1.51-1.89)2.48 (2.25-2.75)1.69 (1.33-2.15)
Radiotherapy to chest     
 No radiotherapy1.001.001.001.001.00
 Right side1.14 (1.04-1.24)1.00 (0.80-1.24)1.09 (1.01-1.18)1.12 (1.03-1.22)1.02 (0.86-1.22)
 Left side1.01 (0.93-1.11)1.14 (0.93-1.40)1.01 (0.93-1.08)1.06 (0.98-1.15)1.05 (0.89-1.23)
 Both sides or unknown1.35 (0.71-2.56)1.91 (0.45-8.20)1.20 (0.68-2.12)1.66 (0.92-2.99)1.77 (0.55-5.73)

The authors regret these errors.