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Table 2: Characteristics of patients with MGD and SGD^{^a}
All Subjects MGD SGD P Value
Patient characteristics 
    No. of patients 71 28 43 
    No. of glands 120 77 43 
    Mean age (yr) 62 (range, 21–88) 62.4 62.4 .99
    Female 58 (82%) 26 (93%) 32 (74%) .15
4D-CT characteristics 
    Mean size of abnormal glands (mm) 9.6 (6.2) 7.5 (3.3) 11.2 (7.4) .003
    Median size of abnormal glands (mm) 9 7 10 
Preoperatively detected lesions 
    1 33 (46%) 6 (21%) 27 (63%) .003
    ≥2 28 (39%) 16 (58%) 12 (28%) 
    None 10 (14%) 6 (21%) 4 (9.3) 
Biochemical markers 
    Serum calcium level (mg/dL) 10.6 (0.6) 10.4 (0.6) 10.7 (0.6) .08
    Serum parathyroid hormone level (pg/mL) 93 (43) 87 (41) 97 (44) .34
    WIN 989 (484) 910 (453) 1040 (501) .27
MGD scores 
    Composite MGD score 3.4 (1.6) 4.3 (1.5) 2.7 (1.4) <.001
    4D-CT MGD score 2.1 (1.4) 2.9 (1.1) 1.5 (1.5) <.001
    4D-CT sensitivity 
    Detection of lesions 82 (69%) 43 (56%) 39 (91%) 
    Detection of all lesions in individual patients 47 (67%) 8 (29%) 39 (91%) 
Parathyroid adenoma localization 
    ≥1 Incorrectly localized or missed adenomas 24 (33%) 20 (71%) 4 (9%) 
    All adenomas localized correctly 47 (67%) 8 (29%) 39 (91%) 
↵a Values are expressed as mean (SD) except as specified.