Table 3

Multivariable analysis: all patients

VariableNo. of patientsOR (95% CI)p value
SLNB doneSLNB not done
Age, yr
 50–752231770.55 (0.33–0.91)0.021
 > 75681620.15 (0.09–0.26)< 0.001
Location of primary tumour
 Trunk1241310.50 (0.33–0.76)0.001
 Head and neck511190.23 (0.14–0.36)< 0.001
Breslow depth, mm
 1.01–4.028314517.0 (10.3–29.3)< 0.001
 > 4.058836.8 (3.6–13.0)< 0.001
Mitotic rate, ≥ 1 mitoses/mm23252731.8 (1.1–2.9)0.040
Lymphovascular invasion1363.3 (1.1–11.2)0.041
  • CI = confidence interval; OR = odds ratio; SLNB = sentinel lymph node biopsy.