Table 2.

Demographic and Clinical Characteristics of 300 HIV-Infected Patients Stratified by Smoking Status

Characteristic*	Smokers (N = 188)	Non-Smokers (N = 112)	p-Value±
Age (yr), med (IQR) Men, n (%) Race, n (%)      African American Time since HIV diagnosis (yrs), med (IQR) MSM, n (%) Alcohol use, n (%)      Previous use      Current use Intravenous drug use, n (%)      Previous use      Current use Crack cocaine use, n (%)      Previous use      Current use Antiretroviral use, n (%) Time on antiretroviral therapy (yrs), med (IQR) Number of prior antiretrovirals, med (IQR) Vaccination status, n (%) CD4 cell count (cells/mm3), med (IQR) HIV RNA level (log10 copies/ml), med (IQR)	44 [40, 49] 135 (72) 145 (77) 9 [7, 14] 54 (29) 89 (47) 50 (27) 40 (21) 7 (4) 105 (56) 68 (36) 156 (83) 9 [6, 11] 4 [3, 6] 105 (56) 351 [151, 630] 2.8 [1.7, 4.4]	45 [38, 51] 65 (58) 83 (74) 10 [7, 13] 34 (30) 31 (28) 11 (10) 13 (12) 0 (0) 34 (30) 12 (11) 92 (82) 9 [7, 12] 4 [3, 7] 62 (55) 490 [272, 656] 1.9[1.7, 4.1]	0.361 0.015 0.560 0.549 0.764 <0.001 <0.001 0.034 0.048 <0.001 <0.001 0.853 0.316 0.139 0.934 0.012 0.015

^*All factors which vary over time were measured at the last pneumonia event among those who had pneumonia and at the last clinic visit among those who did not experience pneumonia; med, median; IQR, interquartile range; MSM, men who have sex with men; ±

^±p-value for Chi-square test for independence, t-test for equality of means using pooled variance procedures, or Wilcoxon-Mann-Whitney test, as appropriate, values ≤0.05 considered significant.