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Table 1: Baseline characteristics
Clinical Variable Total (n = 442) Normal (n = 308) Abnormal (n = 134) P Valuea Age (yr) 8.2 8.5 7.5 .003 Sex (No.) (%) .49     Male 233 (53) 159 (52) 74 (55)     Female 209 (47) 149 (48) 60 (45) Clinical indication (No.) (%) .44     GHD 216 (49) 145 (47) 71 (53)     CPP 154 (35) 113 (37) 41 (31)     SS 72 (16) 50 (16) 22 (16) Sedation (No.) (%) 225 (51) 147 (48) 78 (58) .04 Duration of study (hr:min:sec) 0:56:19 0:56:57 0:54:52 .20 
↵a The P value for quantitative variables was calculated using a t test of unequal variance. The P value for categoric variables was calculated using a χ2 test.