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. 2014 Nov 19;9(11):e112836. doi: 10.1371/journal.pone.0112836

Table 1. Baseline characteristics of HIV-infected patients with atazanavir-associated urolithiasis and controls.

Controls (n = 90) Cases (n = 30) p
Male [n (%)] 68 (75.6%) 26 (86.7%) 0.31
Age (years) [median (IQR)] 47 [39, 52.8] 45.5 [42, 50.5] 0.85
Body Mass Index (BMI) (kg/m2) (median [IQR]) 23 [21.1, 25.7] 22.8 [21.3, 24.2] 0.60
Diabetes [n (%)] 9 (10%) 1 (3.3%) 0.45
Duration of HIV infection (years) [median (IQR)] 12.0 [4.9, 18.3] 9.7 [4.2, 17.7] 0.47
CDC disease stage 0.20
A 48 (53.9%) 20 (66.7%)
B 14 (15.7%) 1 (3.3%)
C 27 (30.3%) 9 (30%)
Nadir CD4 (cell count, cells/mL) 204 [112, 297] 209.5 [67, 313] 0.79
CD4+ cell count, cells/mL (IQR?) 492 [344, 657] 443 [401, 620] 0.77
Plasma HIV RNA >50 cp/mL [n (%)] 59 (65.6%) 1 (3.3%) <0.001
Duration of ATV prior to urolithiasis (years) [median (IQR)] 1.9 [1.2, 3.2] 3.1 [2.2, 3.8] <0.009
Associated ARV therapy [(n) %]
Ritonavir (100 mg od) [(n) %] 68 (75.6%) 29 (96.7%) <0.02
Lamivudine/emtricitabine 82 (91.1%) 26 (86.7%) 0.64
Abacavir 30 (33.3%) 10 (33.3%) 1.00
Zidovudine 6 (6.7%) 3 (10%) 0.69
Didanosine 11 (12.4%) 2 (6.7%) 0.51
Tenofovir 47 (52.8%) 16 (53.3%) 1.00
Baseline creatinine clearance* (median [IQR]) 91.9 [77.5, 99.9] 81.5 [73.1, 98.2] 0.16
Chronic liver disease
Hepatitis B 3 (3.3%) 1 (0.03%)
Hepatitis C 2 (2.2%) 4 (13.3%)
Any disease (including hepatitis) 8 (8.9%) 6 (20.0%)
Chronic kidney disease** before urolithiasis [n (%)] 7 (7.9%) 4 (14.3%) 0.29
Prior treatment with indinavir (years) [(n) %] 18 (20%) 13 (44.8%) <0.02
Duration of indinavir (months) (median [IQR]) 0 [0, 0] 0 [0, 32] <0.004
Previous history of indinavir-urolithiasis [n (%)] 1 (1.2%) 8 (26.7%) <0.001
Previous history of urolithiasis before ATV therapy [n (%)] 7 (7.8%) 11 (36.7%) <0.01
Serum calcium (mmol/L) (median [IQR]) 2.3 [2.2, 2.4] 2.3 [2.3, 2.4] 0.96
Serum free bilirubin level (mmol/L) (median [IQR]) 30.9 [17.7, 45] 49.1 [32.5, 56] <0.004