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Table 1 Candidate variables and associated chi-square statistics and p-values, for men and women

From: Individual risk of cutaneous melanoma in New Zealand: developing a clinical prediction aid

   Women Men
   Controls n (%) Cases n (%) Chi-square statistic p Controls n (%) Cases n (%) Chi-square statistic p
Age at diagnosis (AGE) <=50 years 57 (41) 93 (51) 3.22 0.073 69 (53) 53 (28) 18.98 <0.001
  > 50 years 82 (59) 89 (49)    62 (47) 133 (72)   
Had blistering sunburn (SUNBURN) 71 (51) 118 (65) 6.16 0.013     
Teenage hair colour (HAIRCOLOUR) Black/brown 89 (64) 89 (49) 7.30 0.007     
  Fair/blond/red 50 (36) 93 (51)       
Eye colour (EYECOLOUR) Brown 25 (18) 20 (11) 5.26 0.154 17 (13) 39 (21) 5.20 0.158
  Hazel 30 (22) 31 (17)    29 (22) 30 (16)   
  Green 20 (14) 29 (16)    17 (13) 30 (16)   
  Grey/blue 64 (46) 102 (56)    68 (52) 87 (47)   
Skin colour (SKINCOLOUR) Olive 22 (16) 7 (4) 18.50 <0.001 12 (9) 17 (9) 3.88 0.144
  Medium 53 (38) 57 (31)    56 (43) 60 (32)   
  Fair 64 (46) 118 (65)    63 (48) 109 (59)   
Freckling (FRECKLING) None 77 (55) 73 (40) 14.19 0.003     
  Few 45 (32) 60 (33)       
  Moderate 10 (7) 18 (10)       
  Many 7 (5) 31 (17)       
Number moles > =5 mm on right arm (MOLES_RARM) 0 96 (69) 88 (48) 21.76 <0.001 Continuous variable 1.15 (odds ratio) 0.048
  1 23 (17) 30 (16)      
2 11 (8) 22 (12)       
  3+ 8 (6) 41 (23)       
1st degree relative with large or unusual moles (FAMHXMOLES) 56 (40) 116 (64) 17.44 <0.001     
Personal history of NMSC (NMSC) 5 (4) 20 (11) 6.00 0.014 5 (4) 28 (15) 10.41 0.001
Occupation < =18 years (OCC < =18) Indoor      44 (34) 43 (23) 7.14 0.028
  Indoor and outdoor      52 (40) 67 (36)   
  Outdoor      35 (27) 74 (40)   
Occupation >18 years (OCC > 18) Indoor      44 (34) 43 (23) 6.97 0.031
  Indoor and outdoor      48 (37) 61 (33)   
  Outdoor      39 (30) 80 (43)   
Birthplace (BIRTHPLACE) Outside NZ      23 (18) 15 (8) 6.57 0.010
  In NZ      108 (82) 171 (92)