Candidate predictive factors initially.

Abbreviation: BMI: body mass index; SCF: Irradiated to supraclavicular fossa; IMN: Irradiated to internal mammary lymph nodes
MLD: mean dose to the ipsilateral lung; IV5-IV50: ipsilateral lung volume received 5-50Gy (%); p-valve: univariate logistic test; AIV5-AIV50: absolute ipsilateral lung volume received 5-50Gy (cc); p-valve: univariate logistic test
#0 = Left, 1 = Right
*0 = No, 1 = Yes
ѱ0 = PM (partial mastectomy), 1 = MRM (modified radical mastectomy)
&0 = 6MV, 1 = 10MV, 2 = 6+10MV; T stage: 0 = T0, T1 (T1a, T1b, T1c, T1m, T1s), 1 = T2, 2 = T3, T4 (T4a, T4b)
N stage: 0 = N0, 1 = N1 (N1, N1a), 2 = N2 (N2, N2a), N3 (N3, N3a, N3b)
Lung (d): maximum Lung depth from chest wall to tangential line between extreme points of PTV in the section of nipple on CT image; Total (d): maximum depth from skin to tangential line between extreme points of PTV in the section of nipple on CT image
Candidate predictive factors initially.