Skip to main content

Table 2 Patient demographic data in relation to breast cancer laterality (n = 223)

From: Is laterality in breast Cancer still worth studying? Local experience in Bahrain

  Right-sided Breast
n (%)
Left-sided Breast
n (%)
P. value
Age at diagnosis
  < 50 60 (55.6) 58 (50.4) 0.444
  ≥ 50 48 (44.4) 57 (49.6)  
Nulliparous
 Yes 27 (25.0) 20 (17.4) 0.164
 No 81 (75.0) 95 (82.6)
History of breastfeeding
 Yes 74 (68.5) 86 (75.4) 0.251
 No 34 (31.5) 28 (24.6)  
Family history of malignancy
 Yes 43 (40.2) 32 (27.8) 0.052
 No 64 (59.8) 83 (72.2)
Size of tumor
  ≤ 5 cm 88 (81.5) 102 (88.7) 0.129
  > 5 cm 20 (18.5) 13 (11.3)
Summarized histopathology
 Invasive Ductal Carcinoma (NST) 91 (84.3) 84 (73.0) 0.212
 Invasive Ductal Carcinoma (ST) 7 (6.5) 11 (9.6)
  Ductal carcinoma in situ (DCIS) 3 (2.8) 9 (7.8)
 Invasive Lobular Carcinoma (NST) 6 (5.6) 7 (6.1)
 Mixed Invasive Ductal & Lobular 1 (0.9) 4 (3.5)
ER/PR Hormonal Status
 Positive 65 (61.9) 68 (60.7) 0.866
 Negative 35 (33.3) 40 (35.7)
 Not available 5 (4.8) 4 (3.6)
HER2
 Positive 33 (31.4) 30 (27.3) 0.494
 Negative 61 (58.1) 72 (65.5)
 Not available 11 (10.5) 8 (7.3)
Multifocal
 Yes 23 (21.3) 31 (27.4) 0.442
 No 81 (75.0) 76 (67.3)
 Not available 4 (3.7) 6 (5.3)  
Final stage: lymph node
 Negative 47 (43.5) 57 (49.6) 0.366
 Positive 61 (56.5) 58 (50.4)
Final stage: metastasis
 Mo 93 (86.1) 104 (90.4) 0.315
 M1 15 (13.9) 11 (9.6)
Tumor Stage
 Early 70 (64.8) 93 (80.9) 0.025
 Locally advanced 24 (22.2) 13 (11.3)
 Metastatic (M1) 14 (13.0) 9 (7.8)
Five-year survival
 Yes 74 (79.6) 84 (82.4) 0.408
 No 16 (17.2) 12 (11.8)
 Lost follow up 3 (3.2) 6 (5.9)
Site of recurrence
 Local 7 (6.9) 5 (4.5) 0.199
 Distant Metastasis 10 (9.9) 20 (18.0)
 No 84 (83.2) 86 (77.5)
History of malignancy
 Yes 2 (1.9) 3 (2.6) 0.703
 No 105 (98.1) 111 (97.4)
Malignancy type in past
 Breast 0 (0) 1 (33.3) 0.172
 Ovaries 1 (50.0) 0 (0)
 Uterine 0 (0) 2 (66.7)
 Others 1 (50.0) 0 (0)
Grade of the main tumor
 Grade 1 10 (9.8) 10 (9.8) 0.608
 Grade 2 50 (49.0) 47 (46.1)
 Grade 3 37 (36.3) 40 (39.2)
 Not available 5 (4.9) 5 (4.9)
Vascular and lymphatic invasion
 Negative 50 (48.1) 46 (43.8) 0.775
 Positive 52 (50.0) 56 (53.3)
 Not available 2 (1.9) 3 (2.9)