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Table 1 Patient demographics and clinical characteristics (n = 20300)

From: Neoadjuvant radiotherapy improves overall survival for T3/4N+M0 rectal cancer patients: a population-based study of 20300 patients

Characteristics Level Number (%)
Age at diagnosis, years Mean ± SD 60.76 ± 13.207
Median (range) 60 (17~101)
≤60 10283(50.7%)
> 60 10017(49.3%)
Sex Male 12097(59.6%)
Female 8203(40.4%)
Race White 16403(80.8%)
Black 1663(8.2%)
American Indian/Alaska Native 166(0.8%)
Asian or Pacific Islander 2068(10.2%)
Marital status Married 11834(58.3%)
Unmarried 7742(38.1%)
Unknown 724(3.6%)
Tumour grade Well differentiated 1255(6.2%)
Moderately differentiated 14457(71.2%)
Poorly differentiated 2676(13.2%)
Undifferentiated 293(1.4%)
Unknown 1616(8.0%)
Tumour size 0~3 cm 5856(28.8%)
3~5 cm 8097(39.9%)
> 5 cm 6347(31.3%)
AJCC Stage II 7808(38.5%)
III 12492(61.5%)
AJCC T Stage T1 554(2.7%)
T2 1609(7.9%)
T3 16223(79.9%)
T4 1914(9.4%)
AJCC N Stage N0 7808(38.5%)
N1 8745(43.1%)
N2 3747(18.5%)
Treatment modality Only surgery 2955(14.6%)
Neoadjuvant RT 12133(59.8%)
Adjuvant RT 3765(18.5%)
Surgery + chemotherapy 1447(7.1%)
  1. RT radiotherapy