Table 4: Odds ratio (OR) with 95% confidence intervals (CI) of melanoma by tertile of serum fatty acids percentage composition, adjusted for phototype, education and sun exposure.

IaIIIII trend
OROR(95% CI)OR(95% CI)

SFAsb
 Palmitic1.000.79(0.22–2.87)0.71(0.18–2.76)0.440
 Margaric (daturic)1.000.49(0.12–1.91)1.66(0.39–7.16)0.646
 Stearic1.001.85(0.46–7.43)3.00(0.56–16.07)0.101
 Arachidic1.001.13(0.20–6.54)2.05(0.45–9.40)0.334
 Lignoceric1.000.24(0.05–1.11)0.38(0.09–1.55)0.552
MUFAsb
 Oleic1.001.98(0.51–7.60)0.82(0.22–3.08)0.977
 Nervonic1.001.82(0.31–10.78)1.26(0.15–10.48)0.305
PUFAsb
 Linoleic1.001.10(0.34–3.58)0.71(0.20–2.45)0.420
 Arachidonic1.000.50(0.14–1.86)1.10(0.33–3.71)0.459
 EPA1.001.65(0.40–6.69)0.64(0.12–3.40)0.785
 DPA1.000.49(0.13–1.85)0.73(0.20–2.67)0.697
 DHA1.000.42(0.09–2.00)0.44(0.11–1.74)0.581
Groupings
 SFAs1.000.28(0.04–1.73)1.56(0.37–6.61)0.848
 MUFAs + PUFAs1.000.62(0.17–2.26)0.52(0.11–2.34)0.686
 MUFAs1.001.33(0.33–5.29)0.71(0.17–2.96)0.876
 PUFAs1.000.95(0.25–3.59)0.98(0.28–3.46)0.850
 SFAs/MUFAs + PUFAs1.001.41(0.33–6.05)1.65(0.43–6.33)0.962
 SFAs/PUFAs1.000.88(0.25–3.12)1.31(0.41–4.14)0.692
 n-3 PUFAs1.000.70(0.16–3.08)0.95(0.23–3.93)0.531
 n-6 PUFAs1.000.64(0.17–2.46)0.97(0.29–3.17)0.775
 n-3 PUFAs/n-6 PUFAs1.001.55(0.46–5.27)1.04(0.25–4.37)0.504

aReferent group.
bSFAs: saturated fatty acids; MUFAs: monounsaturated fatty acids; PUFAs: polyunsaturated fatty acids.