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Table 1 Clinical and demographic characteristics of study participants.

From: Cross sectional analysis of respiratory symptoms in an injection drug user cohort: the impact of obstructive lung disease and HIV

  OLD- OLD+  
  HIV- HIV+ HIV- HIV+ P-value*
N 580 243 106 45  
Age, yr 48.1 (8.04) 47.7 (6.44) 50.1 (8.82) 48.8 (8.40) 0.05
Male, n(%) 385 (66.4) 152 (62.6) 75 (70.8) 30 (66.7) 0.49
Race/ethnicity, n(%)      
   Black 512 (88.3) 234 (96.3) 90 (84.9) 39 (86.7) <0.01
Smoking status, n(%)      
   Current 500 (86.2) 203 (83.5) 94 (88.7) 38 (84.4)  
   Former 53 (9.14) 25 (10.3) 10 (9.43) 3 (6.67)  
   Never 27 (4.66) 15 (6.17) 2 (1.89) 4 (8.89) 0.53
Smoking, pack-yr 19.5
(12-33)
19
(10.5-32.4)
20.8
(14-36)
21.9
(10.8-36.5)
0.56
Current IDU, n(%) 246 (42.4) 87 (35.8) 44 (41.5) 15 (33.3) 0.25
6 mo income, n(%)      
   Not reported 12 (2.1) 7 (2.9) 5 (4.7) 2 (4.4)  
   None 147 (25.3) 52 (21.4) 21(19.8) 7 (15.6)  
   <$5,000 274 (47.2) 133 (54.7) 51 (48.1) 25 (55.6)  
   $5,000-$10,000 91 (15.7) 39 (16.0) 23 (21.7) 6 (13.3)  
   >$10,000 56 (9.7) 12 (4.9) 6 (5.7) 5 (11.1) 0.13
High school education, n(%) 259 (44.7) 85 (35.0) 42 (39.6) 18 (45) 0.10
BMI, (kg/m2) 25.7
(22.8-30.3)
24.9
(21.8-29.1)
24.2
(22.0-27.6)
22.3
(21.2-28.3)
<0.01
Hemoglobin (gm/dL) 13.4 (1.61) 12.8 (1.58) 13.4 (1.82) 12.9 (1.91) <0.01
MRC score 0.96 (1.25) 1.19 (1.31) 1.35 (1.41) 1.69 (1.46) <0.01
Bronchodilator use, n(%) 70 (12.1) 47 (19.3) 35 (33.0) 20 (44.4) <0.01
CD4 cell count N/A 323
(177-502)
N/A 305
(168-487)
0.88
HIV viral load      
   >400 copies, n(%) N/A 112 (46.1) N/A 19 (42.2) 0.63
   X 100K, mean(SD)±   62.2 (103)   111 (176) 0.06
HAART use, n(%) N/A 133 (54.7) N/A 22 (48.9) 0.19
Pneumonia, n(%)      
   All 15 (2.59) 3 (1.23) 3 (2.83) 1 (2.22) 0.57
   Pneumocystis 0 2 (0.82) 0 0 0.22
  1. *P-value represents test for overall difference across means or proportions. Values presented as mean (S.D.) or median (IQR) unless indicated. OLD = Obstructive lung disease; HIV = Human immunodeficiency virus; IDU = Injection drug use; BMI = Body mass index; MRC = Medical research council; CD4 = CD4+ T-Helper cells; HAART = Highly active anti-retroviral therapy; pack-yr = Number of packs smoked per day * years smoked; ±Mean(SD) of viral load only for those participants with viral load >400.