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Table 1 Malaysian Mammographic Study cohort description by mammography history

From: A cross sectional study on the motivators for Asian women to attend opportunistic mammography screening in a private hospital in Malaysia: the MyMammo study

Variable All women Previous mammogram First mammogram P value
N = 1453 N = 744 N = 709
N % N % N %  
Demographics        
Age1a[mean, sd] 50.0 7.0 53.0 7.0 48.0 7.0 <0.001
Ethnicity2a        
Chinese 1018 70.1 530 71.2 488 68.8 0.194
Indian 223 15.4 117 15.7 106   
Malay 160   69 9.3 91 12.8  
Others 52 3.5 28 3.8 24 3.4  
Education Level2        
Primary 90 6.2 34 4.6 56 8.1 0.006
Secondary 728 50.1 366 49.9 362 52.3  
Tertiary 608 41.8 334 45.5 274 39.6  
Missing 27   10   17   
Monthly Income (RM)2        
Below 5 k 689 47.4 325 44.1 364 52.1 0.010
5 k to 10 k 470 32.4 260 35.3 210   
Above 10 k 277 19.1 152 20.6 125 17.9  
Missing 20   10   10   
Hormonal        
Endogenous        
Age at menarche1a[mean, sd] 13.0 1.0 13.0 1.0 13.0 1.0 0.626
Missing 10   5   5   
Menopausal status2        
Pre/perimenopausal 783 53.9 299 40.2 484 68.6 <0.001
Post-menopausal 667 45.9 445 59.8 222 31.4  
Missing 3   0   3   
Parity2        
Nulliparous 229 15.8 104   125 17.6 0.057
Parous 1224 84.2 640   584 82.4  
Age at first live births1a[mean, sd] 28.0 5.0 28.0 5.0 27.0 5.0 0.001
Missing 230   105   125   
Exogenous        
Oral contraceptive usage status2        
Never 1004 69.1 508 68.5 496 70.4 0.435
Ever used 443 30.5 234 31.5 209 29.6  
Missing 6   2   4   
Hormone replacement therapy        
(HRT) status2        
Never 1306 89.9 627 84.6 679   <0.001
Ever used 142 9.8 114 15.4 28   
Missing 5   3   2   
Medical history        
Family history of breast cancer2a        
No 1301 89.5 646 86.8 655 92.4 <0.001
Yes 152 10.5 98 13.2 54 7.6  
Previous breast biopsy status2a        
No 1305 89.8 676 91.5 629 89.6 0.224
Yes 136 9.4 63 8.5 73 10.4  
Missing 12   5   7   
Gynaecological surgery2        
No 1143 78.7 578 79.7 565 79.7 0.352
Yes 310 21.3 166 22.3 144 20.3  
Sterilisation 103 7.1 52   51 7.2  
Oopherectomy 33 2.3 21 2.8 12 1.7  
Hysterectomy 82 5.6 40 5.4 42 5.9  
Total Hysterectomy/TAHBSO 69 4.8 37   32 4.5  
Salpingectomy/salpingostomy 23 1.6 16 2.1 7   
Body Mass Index (BMI)2        
Underweight 48 3.3 16   32 4.5 0.030
Normal weight 812 55.9 425 57.1 387   
Overweight 576 39.6 292   284 40.0  
Missing 17   11   6   
Diabetes status2        
No 1335 91.9 673 91.1 662 93.8 0.050
Yes 110 7.6 66 8.9 44 6.2  
Missing 8   5   3   
Smoking status2        
Never 1312 90.3 671 90.2 641 90.4 0.887
Ever smoked 141 9.7 73 9.8 68 9.6  
  1. aIndicates variables in the Gail Model
  2. 1Indicates continuous variable
  3. 2Indicates categorical variable
  4. T-test was used for continuous variables and chi-square test for categorical variables