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Table 5 Comparison of a certain indicator at different postoperative time points

From: Analysis of t-test misuses and SPSS operations in medical research papers

Gender n

Postoperative time (week)

1

2

4

8

Male 5

44.20 ± 4.207

35.00 ± 3.082**

19.40 ± 1.140***,###

37.80 ± 3.962*,$$$

Female 5

33.00 ± 4.183

17.00 ± 1.581***

28.40 ± 1.949###

37.60 ± 3.209###,$$

  1. Note: Data are presented as mean ± standard deviation
  2. * indicates the comparison between 1 week after operation and other time points by independent samples t-test, p < 0.05 is labeled as *, p < 0.01 is ** and p < 0.001 is ***
  3. # indicates the comparison between 2 week after operation and other time points by independent samples t-test, p < 0.05 is labeled as #, p < 0.01 is ## and p < 0.001 is ###
  4. $ indicates the comparison between 4 week after operation and other time points by independent samples t-test, p < 0.05 is labeled as $, p < 0.01 is $$ and p < 0.001 is $$$