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Table 1 Demographic and clinical characteristics of the MDACC study sample compared with the sample used to develop the model of Silber and colleagues [1]

From: First-cycle absolute neutrophil count can be used to improve chemotherapy-dose delivery and reduce the risk of febrile neutropenia in patients receiving adjuvant therapy: a validation study

Characteristic MDACC study patients (1986–92) (n = 143) Silber and colleagues' patients (1985–93) (n = 95)
Mean age (years) 46 (SD 10) 46 (SD N/A)
Menopausal status (%)   
   Pre- 55 60
   Peri-, post, or surgical 45 40
Estrogen receptor status (%)   
   Positive 53 47
   Negative 37 48
   Unknown 10 4
Progesterone receptor status (%)   
   Positive 51 48
   Negative 36 39
   Unknown 13 13
Tumor size (cm) (%)   
   <2 36 41
   2–5 58 52
   >5 6 4
   Unknown - 3
Number of nodes (%)   
   0 14 -
   1–3 61 76
   4–9 16 16
   >9 9 5
   Unknown - 3
  1. All patient characteristics were insignificantly different between the two samples, except for the number of positive nodes. N/A, not available.