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. 2012 Oct 12;12:94. doi: 10.1186/1472-6920-12-94

Table 2.

Mean (95% CI) delta-SPS by demographic characteristics

  n Mean delta-SPS 95%CI p value
Female
55
117.4
96.2-138.5
0.0485
Male
76
146.6
126.9-166.2
Age ≥31
67
133.5
111.8-155.3
0.91
Age ≤30
64
135.1
115.6-154.6
Number of elective exposures ≤14
44
143.4
122.5-164.3
0.051
Number of elective exposures ≥15
87
129.7
110.4-148.9
Number of unique electives ≤8
101
134.3
117.7-150.9
1.00
Number of unique electives ≥9 30 134.2 102.9-165.4  

P-values calculated using two-tailed t-test. Male:Female ratio for the entire cohort was 1.38. Male:Female ratio for the group with ≤14 elective exposures was 1.32 compared to 1.41 for the group with ≥15 elective exposures (p=ns).