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Table 1 Demographic characteristics of the prison’s population (n = 8574)

From: Inside the nation’s largest mental health institution: a prevalence study in a state prison system

Characteristics Younger
n = 7107
Older
n = 1467
All
n = 8574
p valuea
Younger vs older
Age, mean (SD) in years 32.4 (8.4) 57.2 (6.8) 36.7 (12.4)  
Age, range in years 16–49 50–88 16–88  
Gender     0.003
 Female 637 (9.0) 97 (6.6) 734 (8.6)  
 Male 6470 (91.0) 1370 (93.4) 7840 (91.4)  
Race     <0.0001
 Black 1913 (26.9) 309 (21.1) 2222 (25.9)  
 Hispanic 507 (7.1) 45 (3.1) 552 (6.4)  
 White 4473 (62.9) 1089 (74.2) 5562 (64.9)  
 Other 214 (3.0) 24 (1.6) 238 (2.8)  
Marital status     <0.0001
 Married 1199 (17.0) 408 (28.1) 1607 (18.9)  
 Single 953 (13.5) 619 (42.6) 1572 (18.5)  
 Divorced or widowed 4884 (69.4) 425 (29.3) 5309 (62.6)  
Highest level of education     <0.0001
 College graduate 57 (0.8) 43 (3.0) 100 (1.2)  
 Some college 142 (2.1) 66 (4.6) 208 (2.5)  
 High school/ equivalent 5266 (76.0) 991 (69.5) 6257 (74.9)  
 Less than high school 1300 (18.8) 270 (18.9) 1570 (18.8)  
 Other 160 (2.3) 56 (3.9) 216 (2.6)  
Body mass index, kg/m2     <0.0001
  < 18.5 (underweight) 18 (0.2) 4 (0.3) 22 (0.3)  
 18.5- < 25.0 (normal) 1697 (23.9) 191 (13.0) 1888 (22.0)  
 25- < 30 (overweight) 2848 (40.1) 594 (40.5) 3442 (40.1)  
  ≥ 30 (obese) 2544 (35.8) 678 (46.2) 3222 (37.6)  
History of tobacco use 3864 (54.4) 562 (38.1) 4426 (51.6) <0.0001
Pack-years for smokers only, mean (SD) 13.3 (11.2) 34.9 (23.3) 16.0 (15.2) <0.0001
Smokeless years, mean (SD) 6.6 (6.9) 18.4 (16.1) 7.8 (9.0) <0.0001
Medical Conditions, mean (SD) 1.1 (1.3) 2.6 (2.1) 1.4 (1.6) <0.0001
Chronic Medical Conditions     <0.0001
 0 2924 (41.4) 268 (18.3) 3192 (37.2)  
 1 2286 (32.7) 297(20.3) 2583 (30.1)  
 2–3 1500 (21.1) 465 (31.7) 1965 (22.9)  
 ≥ 4 397 (5.6) 437 (29.8) 834 (9.7)  
  1. a p-values are from Fisher’s exact test or the Pearson chi-square statistic
  2. Values represent numbers and percentages unless indicated otherwise