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Table 2 Patient characteristics of the study population in the first and second supplementary analyses

From: Impact of the interval between neoadjuvant concurrent chemoradiotherapy and esophagectomy in the modern era: a population-based propensity-score-matched retrospective cohort study in Asia

 SA-1 SA-2 
4–8 weeks (n = 95)8–12 weeks (n = 95)4–7 weeks (n = 132)7–12 weeks (n = 132)
Number or
mean (sd)
(%)Number or
mean (sd)
(%)SDifNumber or
mean (sd)
(%)Number or
mean (sd)
(%)SDif
Age 55.06 (9.29) 54.05 (8.20) 0.11554.30 (9.13) 54.13 (8.54) 0.019
GenderFemale7(7)6(6)0.0429(7)8(6)0.031
Male88(93)89(94) 123(93)124(94) 
ResidencyNon-north52(55)55(58)0.06476(58)80(61)0.062
North43(45)40(42) 56(42)52(39) 
Tumor size≤ 5 cm47(49)40(42)0.14854(41)53(40)0.015
> 5 cm48(51)55(58) 78(59)79(60) 
Tumor differentiationPoorly/undifferentiated21(22)21(22)042(32)36(27)0.100
Well/moderately74(78)74(78) 90(68)96(73) 
RT deliveryNon-IGRT71(75)72(76)0.024103(78)104(79)0.018
IGRT24(25)23(24) 29(22)28(21) 
Use of PETNo10(11)9(9)0.03513(10)16(12)0.073
Yes85(89)86(91) 119(90)116(88) 
Tumor locationCervical00
Non-cervical  
T-stageT1-T29(9)12(13)0.10118(14)16(12)0.045
T3-T486(91)83(87) 114(86)116(88) 
N-stageNegative15(16)11(12)0.12316(12)14(11)0.048
Positive80(84)84(88) 116(88)118(89) 
DrinkingNo13(14)10(11)0.09716(12)15(11)0.024
Yes82(86)85(89) 116(88)117(89) 
Betel nut chewingNo45(47)39(41)0.12755(42)55(42)0
Yes50(53)56(59) 77(58)77(58) 
SmokingNo18(19)14(15)0.11318(14)19(14)0.022
Yes77(81)81(85) 114(86)113(86) 
BMI 21.85 (3.08) 22.17 (3.21) 0.10421.83 (3.39) 21.80 (3.19) 0.009
Number of lymph nodes< 1519(20)24(25)0.12633(25)34(26)0.017
≥ 1576(80)71(75) 99(75)98(74) 
RT dose (Gy) 47.03 (3.97) 47.49 (3.71) 0.12047.56 (3.68) 47.85 (3.37) 0.080
  1. BMI body mass index, IGRT image-guided radiotherapy, nCCRT neoadjuvant concurrent chemoradiotherapy, PET positron emission tomography, RT radiotherapy, sd standard deviation, SDif standardized difference
  2. Rounded
  3. The exact numbers were not reported because of a Health and Welfare Data Science Center (HWDC) database center policy to avoid numbers in single cells ≤ 2)