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Table 1 Characteristics by skin cancer status, the Nambour Skin Cancer Study (N = 1,171)

From: Prospective study of physical activity and risk of squamous cell carcinoma of the skin

Characteristics   Women    Men  
  SCC (n = 90) No SCC (n = 575) p-value SCC (n = 98) No SCC (n = 408) p-value
  Mean (SD)
Age (years) 57.3 (9.9) 48.1 (12.1) < 0.001 59.7 (11.7) 48.3 (13.0) < 0.001
BMI, kg/m2 26.2 (5.0) 25.8 (4.7) 0.515 26.6 (3.8) 26.5 (3.6) 0.868
  N (%)
History of skin cancer 48 (53.3) 123 (21.4) < 0.001 64 (65.3) 88 (21.6) < 0.001
Education       
   High school only 63 (70.0) 366 (63.7) 0.446 37 (37.8) 167 (40.9) 0.284
   Certificate/diploma 3 (3.3) 34 (5.9)   31 (31.6) 147 (36.0)  
   University 22 (24.4) 147 (25.6)   22 (22.4) 59 (14.5)  
   Trade/other 2 (2.2) 28 (4.9)   8 (8.2) 35 (8.6)  
Pack-years of smoking       
   None 56 (62.2) 383 (66.6) 0.599 35 (35.7) 181 (44.4) 0.115
   1-7 13 (14.4) 92 (16.0)   16 (16.3) 65 (15.9)  
   > 7-20 10 (11.1) 49 (8.5)   13 (13.3) 67 (16.4)  
   > 20 11 (12.2) 51 (8.9)   34 (34.7) 95 (23.3)  
Tanning ability of skin       
   Always burn 33 (36.7) 130 (22.6) 0.003 29 (29.6) 55 (13.5) < 0.001
   Burn then tan 54 (60.0) 377 (65.6)   62 (63.3) 310 (76.2)  
   Only tan 3 (3.3) 68 (11.8)   7 (7.1) 42 (10.3)  
Painful sunburns throughout life (1992)
   Never 10 (11.1) 62 (10.8) 0.084 15 (15.3) 48 (11.8) 0.798
   Once 21 (23.3) 114 (19.8)   14 (14.3) 55 (13.5)  
   2-5 times 29 (32.2) 263 (45.7)   40 (40.8) 176 (43.2)  
   More than 5 times 30 (33.3) 136 (23.7)   29 (29.6) 128 (31.4)  
Freckling of the back (1992)a
   Nil 18 (20.5) 197 (35.1) 0.001 19 (19.6) 125 (32.0) < 0.001
   Mild 29 (33.0) 215 (38.3)   25 (25.8) 137 (35.0)  
   Moderate 30 (34.1) 103 (18.3)   20 (20.6) 76 (19.4)  
   Severe 11 (12.5) 47 (8.4)   33 (34.0) 53 (13.6)  
Clinical elastosis of the neck (1992)a
   Nil 5 (5.6) 160 (27.8) < 0.001 2 (2.1) 72 (17.7) < 0.001
   Mild 38 (42.2) 282 (49.0)   35 (36.1) 205 (50.4)  
   Severe 47 (52.2) 133 (23.1)   60 (61.9) 130 (31.9)  
  1. a Column percentages may not sum to 100% due to missing values (freckling of the back: women n = 15, men n = 18; elastosis: men n = 2)