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Table 4 Comparison of demographic and biochemical characteristics of the patients

From: Establishment of reference intervals of monomeric prolactin to identify macroprolactinemia in Chinese patients with increased total prolactin

Characteristics True hyperprolactinemia
(n = 879)
Macroprolactinemia
(n = 261)
P value
Age, years (IQR) 33(27, 43) 34(27, 42) 0.897
Gender, N (%)    
Male 210(23.9 %) 38(21.8 %) 0.712
Female 669(76.1 %) 204(78.2 %) 0.625
Total prolactin, ng/mL (IQR) 50.7(33.1, 97.3) 32.9(26.3, 45.0) < 0.001
Monomeric prolactin, ng/mL (IQR) 37.2(24.5, 69.0) 12.0(8.1, 13.8) < 0.001
Imaging studies (MRI, CT) * 201 30  
Adenoma detected, N (%) 120(59.7) 7(23.3) < 0.001
Microadenoma 54 5  
  1. *MRI, magnetic resonance imaging; CT, computed tomography