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. Author manuscript; available in PMC: 2021 Aug 1.
Published in final edited form as: Am J Kidney Dis. 2020 Apr 18;76(2):184–193. doi: 10.1053/j.ajkd.2019.12.010

Table 1:

Baseline Characteristics of CRIC participants overall and by opioid and NSAID use

Opioid use at baseline NSAID use at baseline
No (n=3548) Yes (n=391) P No (n=3327) Yes (n=612) P
Age (years) 0.3 0.003
21-<45 494 (13.9%) 44 (11.3%) 462 (13.9%) 76 (12.4%)
45-<65 2025 (57.1) 236 (60.4) 1872 (56.3) 389 (63.6)
65+ 1029 (29.0) 111 (28.4) 993 (29.8) 147 (24.0)
Male sex 2004 (56.5) 157 (40.2) <0.001 1908 (57.3) 253 (41.3) <0.001
Black race 1472 (41.5) 186 (47.6) 0.02 1432 (43.0) 226 (36.9) 0.005
Diabetes 1720 (48.5) 188 (48.1) 0.9 1668 (50.1) 240 (39.2) <0.001
Hypertension 3062 (86.3) 329 (84.1) 0.2 2892 (86.9) 499 (81.5) <0.001
Any cardiovascular disease 1159 (32.7) 157 (40.2) 0.003 1156 (34.7) 160 (26.1) <0.001
Rheumatoid Arthritisa 411 (12.2) 81 (22.3) <0.001 404 (12.8) 88 (15.1) 0.1
Asthmab 419 (12.0) 79 (20.5) <0.001 401 (12.3) 97 (16.1) 0.01
Cancer (excluding non-melanoma skin cancer 168 (4.7) 28 (7.2) 0.04 167 (5.0) 29 (4.7) 0.8
Drinking alcohol 743 (20.9) 50 (12.8) <0.001 649 (19.5) 144 (23.5) 0.02
Prior visit with nephrologist 2328 (65.6) 273 (69.8) 0.1 2295 (69.0) 306 (50.0) <0.001
Educationc 0.06 <0.001
Less than high school 752 (21.2) 76 (19.4) 739 (22.2) 89 (14.6)
High school graduate 660 (18.6) 81 (20.7) 631 (19.0) 110 (18.0)
Some college 1015 (28.6) 131 (33.5) 955 (28.7) 191 (31.3)
College graduate or higher 1120 (31.6) 103 (26.3) 1002 (30.1) 221 (36.2)
Income 0.006 0.001
$20,000 or under 1102 (31.1) 138 (35.3) 1082 (32.5) 158 (25.8)
$20,001 - $50,000 847 (23.9) 111 (28.4) 809 (24.3) 149 (24.3)
$50,001 - $100,000 673 (19.0) 61 (15.6) 603 (18.1) 131 (21.4)
More than $100,000 369 (10.4) 23 (5.9) 311 (9.3) 81 (13.2)
Don’t wish to answer 557 (15.7) 58 (14.8) 522 (15.7) 93 (15.2)
Non-opioid/non-NSAID analgesic use 560 (15.8) 114 (29.2) <0.001 532 (16.0) 142 (23.2) <0.001
Tramadol use 72 (2.0) 18 (4.6) 0.001 73 (2.2) 17 (2.8) 0.4
Anxiolytic used 107 (3.0) 38 (9.7) <0.001 109 (3.3) 36 (5.9) 0.002
Anti-epileptic usee 289 (8.2) 95 (24.3) <0.001 315 (9.5) 69 (11.3) 0.2

N=3939. Values given to count (percent).

a)

197 missing

b)

312 missing for opioid use and 69 missing for NSAID use

c)

76 missing for opioid use and 1 missing for NSAID use

d)

353 missing for opioid use and 28 missing for NSAID use

e)

296 missing for opioid use and 28 missing for NSAID use