Table 4.

AHRs for the joint effect of surgery seasons and vitamin D intake on RFS and OS (n = 321)

SeasonVitamin D intake (IU/d)
<239
239-362
363-595
≥596
nAdjusted HR5-y RFS or OS rate (%)nAdjusted HR5-y RFS or OS rate (%)nAdjusted HR5-y RFS or OS rate (%)nAdjusted HR5-y RFS or OS rate (%)
RFS
    Winter23123250.37 (0.17-0.80)66210.54 (0.26-1.13)47310.86 (0.52-2.87)35
    Spring/fall310.56 (0.28-1.12)55280.76 (0.38-1.50)42320.72 (0.37-1.40)44280.67 (0.33-1.37)38
    Summer250.85 (0.42-1.71)38280.63 (0.32-1.24)49270.39 (0.19-0.83)74220.33 (0.15-0.74)56
OS
    Winter23130250.35 (0.16-0.79)66210.25 (0.10-0.65)75310.72 (0.37-1.42)47
    Spring/fall310.51 (0.25-1.06)66280.58 (0.28-1.21)55320.71 (0.35-1.43)51280.60 (0.29-1.25)52
    Summer250.72 (0.35-1.50)42280.57 (0.28-1.16)56270.42 (0.20-0.92)73220.25 (0.10-0.63)72
  • NOTE: Adjusted for age, gender, and clinical stages in Cox proportional hazards model, with the values expressed as AHRs (95% CI).