Table 4.

The relative risk of nonadherence at the 1 and 2-year follow-up visits in patients, according to 2 different profiles

Total number of patients, 1-y follow-up (%), N = 417Adherent, 1-y follow-up (%), N = 381Nonadherent, 1-y follow-up (%), N = 36RR (95% CI)PSensitivity, %Specificity, %PPV, %NPV, %Total number of patients, 2-y follow-up (%), N = 339Adherent, 2-y follow-up (%), N = 306Nonadherent, 2-y follow-up (%), N = 33RR (95% CI)PSensitivity, %Specificity, %PPV, %NPV, %
Two of 3 risk factorsa
 Yes105 (25.2)82 (78.1)23 (21.9)5.24 (2.75–9.97)<0.000163.978.421.995.893 (27.4)73 (78.5)20 (21.5)4.07 (2.11–7.84)<0.000160.676.121.594.7
 No311 (74.8)298 (95.8)13 (4.2)1246 (72.6)233 (94.7)13 (5.3)1
 Missing110000
Two of 4 risk factorsb
 Yes143 (34.4)117 (81.8)26 (18.2)4.96 (2.46–10.00)<0.000172.269.218.296.3122 (36.0)98 (80.3)24 (19.7)4.74 (2.28–9.87)<0.000172.768.019.795.9
 No273 (65.6)263 (96.3)10 (3.7)1217 (64.0)208 (95.9)9 (4.1)1
 Missing110000

Abbreviations: NPV, negative predictive value; PPV, positive predictive value.

  • aBMI < 25 kg/m2, alcohol intake less than twice a month, and preoperative current smoking.

  • bBMI < 25 kg/m2, alcohol intake less than twice a month, preoperative current smoking, and histologic grade I.