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. Author manuscript; available in PMC: 2015 Jan 11.
Published in final edited form as: R J. 2013 Jun;5(1):181–187.

Table 3.

Speed comparisons for the birth outcomes data.

Independence AR-1 Exchangeable Unstructured
Avg. (s) Rel. Avg. (s) Rel. Avg. (s) Rel. Avg. (s) Rel.
geeM 5.28 1.00 9.87 1.00 7.33 1.00 8.18 1.00
gee 10.02 1.90 29.39 2.98 20.09 2.74 21.49 2.63
geepack 9.66 1.83 23.67 2.40 22.59 3.08 25.67 3.14