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. Author manuscript; available in PMC: 2014 Mar 24.
Published in final edited form as: J Am Stat Assoc. 2013 Dec 19;108(504):1173–1188. doi: 10.1080/01621459.2013.810149

Table 2.

Summary statistics for key variables (n = 597)

Marker mean median IQR range
Virological marker
 VL at most recent visit (copies/mL) 11.8K 75 (75, 400) (12, > 500K)
Immunological markers
 CD4 count at most recent visit (cells/uL) 442 407 (254, 576) (8, 1412)
 6-month CD4 count change (%) 7.3 18 (−13, 33) (−80, 736)
 CD4 % at most recent visit 24 23 (17, 30) (.90, 59)
 6-month CD4% change (%) 9.5 4.7 (−6.1, 16) (−74, 209)

K: thousand; IQR: Interquartile range.