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Table 2 Selected characteristics of middle-aged South Australian women with (cases) and without (controls) breast cancer diagnosed in the previous 5 years

From: Connecting the dots between breast cancer, obesity and alcohol consumption in middle-aged women: ecological and case control studies

  Total Cases (n = 80) Controls (n = 235) p-value*
Age last birthday (years)
 Mean 56.4 55.5 56.7 0.128
 SD 6.5 6.5 6.6  
 Median 57 57 57 0.118
 IQR 51–61 51–61 52–62  
[Missing] [0] [0] [0]  
Born in Australia – n (%) [Missing] 240 (75) [0] 60 (75) [0] 180 (77) [0] 0.772
Health status – n (%)
 Very good 133 (42) 20 (25) 113 (48) < 0.001 (Cramer’s V = 0.31)
 Good 126 (40) 31 (39) 95 (40)
 Moderate-fair 52 (17) 28 (35) 24 (10)
 Bad 4 (1) 1 (1) 3 (1)  
[Missing] [0] [0] [0]  
Health status binary – n (%)
 Better 259 (82) 51 (64) 208 (89) < 0.001
 Poorer [Missing] 56 (18) [0] 29 (36) [0] 27 (11) [0] (OR = 4.38)
BMI at each life period – median (IQR) [Missing]
 18–30 21.8 (20.1–24.0) [6] 22.2 (20.7–24.2) [5] 21.6 (20.0–23.8) [1] 0.118
 31–40 23.4 (21.8–26.2) [14] 23.8 (23.3–27.1) [6] 23.0 (20.6–25.7) [7] 0.014
 41–50 24.6 (21.6–28.4) [14] 25.7 (22.8–29.0 [8] 24.2 (21.3–28.1) [6] 0.031
 51–60 25.3 (22.1–29.4) [11] 25.4 (23.4–29.8) [6] 25.3 (21.9–29.4) [5] 0.236
 61–70 24.7 (21.5–29.6) [6] 26.5 (23.5–29.2) [3] 24.5 (21.2–30.1) [3] 0.280
Obesity (BMI ≥30) at each life period (years) – n (%) [Missing]
 18–30 13 (4) [6] 4 (5) [5] 9 (4) [1] 0.526
 31–40 30 (10) [14] 13 (18) [6] 17 (8) [8] 0.023
 41–50 46 (15) [14] 12 (17) [8] 34 (15) [6] 0.709
 51–60 55 (24) [11] 12 (24) [6] 43 (24) [5] 1.000
 61–70 21 (25) [6] 3 (20) [3] 18 (26) [3] 0.751
Ever smoked cigarettes – n (%) [Missing] 117 (37) [0] 31 (39) [0] 86 (37) [0] 0.731
Ever consumed alcohol – n (%) [Missing] 308 (98) [0] 79 (99) [0] 229 (97) [0] 0.495
Age first consumed alcohol (years)
 Mean 16.5 16.8 16.4 0.376
 SD 3.0 3.3 2.8  
 Median 16 16 16 0.996
 IQR 15–18 15–18 15–18  
[Missing] [0] [0] [0]  
Ever regularly consumed alcohol – n (%) [Missing] 265 (86) [0] 67 (86) [0] 198 (86) [0] 0.900
Age when started regular consumption (years) – n (%)
 12–17 23 (9) 2 (3) 21 (11) 0.032 (Cramer’s V = 0.21)
 18–30 192 (72) 53 (79) 139 (70)
 31–40 27 (10) 3 (4) 24 (10)
 41–50 13 (5) 5 (7) 8 (4)  
 51–60 9 (3) 3 (4) 6 (3)  
 61–70 1 (0) 1 (1) 0 (0)  
[Missing] [0] [0] [0]  
  1. *Difference between cases and controls using Chi-Square, Mann-Whitney, t-test as appropriate and Fisher’s 2-sided exact used in the case of small cell counts
  2. Significant results (p < 0.05) in bold