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Table 2 Comparison of the prevalence of low bone mass in schizophrenic patients versus the general community in Japanese subjects

From: Effect of age and disease on bone mass in Japanese patients with schizophrenia

Age subgroup, years Prevalence of low bone mass (t < 1.0) Prevalence of severe low bone mass (t < 2.5)
  Schizophrenia, % Community, % Schizophrenia, % Community, %
Male:     
20 to 29 0(0/20) 6.7 (1/15) 0(0/20) 0 (0/15)
30 to 39 27.9(12/43)* 7.1 (2/28) 0(0/43) 0 (0/28)
40 to 49 34.4(11/32)* 8.8 (5/57) 0(0/32) 0 (0/57)
50 to 59 42.5(17/40)* 12.2 (11/90) 2.5(1/40) 0 (0/90)
60 to 69 60(18/30)* 17.1 (13/76) 3.3(1/30) 0 (0/76)
70 or older 92.3(12/13)* 31.1 (19/61) 30.8(4/13)* 0 (0/61)
Female:     
20 to 29 16.7(4/24) 13.3 (2/15) 0(0/24) 0 (0/15)
30 to 39 21.9(7/32) 15.0 (6/40) 0(0/32) 0 (0/40)
40 to 49 23.5(8/34) 24.2 (15/62) 0(0/34) 0 (0/62)
50 to 59 51.3(20/39) 54.4 (74/136) 2.6(1/39) 0 (0/136)
60 to 69 85.7(24/28) 78.0 (117/150) 7.1(2/28)* 0 (0/150)
70 or older 96.3(26/27) 85.3 (87/102) 14.8(4/27)* 1.0 (1/102)
  1. The obtained data were analyzed using a χ2 test or Fisher's exact test between schizophrenic patients and general community. *P < 0.05