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European Spine Journal

, Volume 27, Issue 5, pp 982–984 | Cite as

Answer to the Letter to the Editor of Jie Weng et al. concerning, “Relationship between preoperative serum rapid turnover proteins and early-stage surgical wound infection after spine surgery” by D. Kudo et al. (Eur Spine J; 2016: doi:10.1007/s00586-016-4855-z)

  • Daisuke Kudo
  • Naohisa Miyakoshi
  • Michio Hongo
  • Yuji Kasukawa
  • Yoshinori Ishikawa
  • Takashi Mizutani
  • Yoichi Shimada
Author's Reply

Dear Sir,

We would like to respond to the Letter to the Editor regarding our manuscript [1] and have incorporated suggestions for improvement. Statistical analyses were repeated using IBM® software and SPSS® Statistics version 25.0 for Mac.

The writer of the letter suggested that some variables are not normally distributed. Variables are expressed as medians and interquartile ranges (Table  1). However, the results are the same because the variables between two groups were compared using Mann–Whitney U tests or Chi-square tests.
Table 1

Baseline characteristics of patients

Variable

Possible SSI

Non-SSI

p

Number of patients

35

70

 

Age (years)

72 (56–80)

66 (57–74)

0.257

Male:Female

21:14

43:27

0.888

BMI (kg/m2)

23.1 (21.2–25.4)

23.9 (21.7–26.9)

0.246

Smoking (n)

10

15

0.418

Alcohol (n)

12

30

0.398

Diabetes (n)

11

13

0.139

Operative time (min)

189.0 (146.5–267.5)

162.5 (101.3–211.0)

0.036

Estimated blood loss (mL)

114.0 (43.5–175.5)

79.0 (41.0–186.0)

0.435

Instrumentation (n)

25

43

0.312

Notes

Compliance with ethical standards

Conflict of interest

None of the authors has any potential conflicts of interest to declare.

References

  1. 1.
    Kudo D, Miyakoshi N, Hongo M, Kasukawa Y, Ishikawa Y, Mizutani T, Shimada Y (2016) Relationship between preoperative serum rapid turnover proteins and early-stage surgical wound infection after spine surgery. Eur Spine J.  https://doi.org/10.1007/s00586-016-4855-z Google Scholar
  2. 2.
    Sakamoto K, Taniguchi H, Kondoh Y, Johkoh T, Sumikawa H, Kimura T, Nishiyama O, Kato K, Kataoka K, Ono K, Kitaichi M, Hasegawa Y (2010) Serum KL-6 in fibrotic NSIP: correlations with physiologic and radiologic parameters. Respir Med 104:127–133CrossRefPubMedGoogle Scholar
  3. 3.
    Blissett J, Meyer C, Haycraft E (2007) Maternal mental health and child feeding problems in a non-clinical group. Eat Behav 8:311–318CrossRefPubMedGoogle Scholar
  4. 4.
    Efron B (1979) Bootstrap methods: another look at the jackknife. Ann Stat 7:1–26CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Daisuke Kudo
    • 1
  • Naohisa Miyakoshi
    • 1
  • Michio Hongo
    • 1
  • Yuji Kasukawa
    • 1
  • Yoshinori Ishikawa
    • 1
  • Takashi Mizutani
    • 1
  • Yoichi Shimada
    • 1
  1. 1.Department of Orthopedic SurgeryAkita University Graduate School of MedicineAkitaJapan

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