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Table 1 Univariate analysis for patient, disease, and drug characteristics of older adults admitted at MRRH, southwestern Uganda from November 2020 to May 2021

From: Predictors of hospital-acquired adverse drug reactions: a cohort of Ugandan older adults

Exposures

Frequency (%) (N = 523)

Outcome

Variable

Categories

‘No ADR’ Frequency (%)

ADR Frequency (%)

Gender

Female

254 (48.6)

118 (46.5)

136 (53.5)

Male

269 (51.4)

149 (55.4)

120 (44.6)

Age in years; median (Interquartile Range) = 67 (62–76)

60–75

356 (68.1)

175 (49.2)

181 (50.8)

> = 75

167 (31.9)

92 (55.1)

75 (44.9)

Ward of admission

Medical

262 (50.1)

123 (46.9)

139 (53.1)

Surgery

163 (31.2)

100 (61.3)

63 (38.7)

Oncology

98 (18.7)

44 (44.9)

54 (55.1)

Type of admission

Not Emergency

197 (37.7)

113 (57.4)

84 (42.6)

Emergency

326 (62.3)

154 (47.2)

172 (52.8)

Previous admission (3 months)

No

293 (56.0)

145 (49.5)

148 (50.5)

Yes

230 (44.0)

122 (53.0)

108 (47.0)

Previous ADR in 1 year

No

371 (70.9)

219 (59.0)

152 (41.0)

Yes

152 (29.1)

48 (31.6)

104 (68.4)

Allergy history

No

482 (92.5)

254 (52.7)

228 (47.3)

Yes

39 (7.5)

12 (30.8)

27 (69.2)

Medication use in previous 3 months

No

49 (9.4)

25 (51.0)

24 (49.0)

Yes

474 (90.6)

242 (51.1)

232 (48.9)

Previous use of the herbal drug in 4 weeks

No

251 (48.0)

124 (49.4)

127 (50.6)

Yes

272 (52.0)

143 (52.6)

129 (47.4)

PIMa

No

304 (58.1)

214 (70.6)

90 (29.6)

Yes

219 (41.9)

53 (24.2)

166 (75.8)

Polypharmacyb

No

245 (46.8)

191 (78.0)

54 (22.0)

Yes

278 (53.2)

76 (27.3)

202 (72.7)

Clinically significant DDIc

No

300 (57.4)

190 (63.3)

110 (36.7)

Yes

223 (42.6)

77 (34.5)

146 (65.5)

Comorbidity

No

185 (35.4)

135 (73.0)

50 (27.0)

Yes

338 (64.6)

132 (39.1)

206 (60.9)

CCI categoryd

<=5

333 (63.7)

240 (72.1)

93 (27.9)

> = 6

190 (36.3)

27 (14.2)

163 (85.8)

Kidney diseasee

No

408 (78.0)

233 (57.1)

175 (42.9)

Yes

115 (22.0)

34 (29.6)

81 (70.4)

Liver disease

No

442 (84.5)

245 (55.4)

197 (44.6)

Yes

81 (15.5)

22 (27.2)

59 (72.8)

Heart failure

No

449 (85.9)

247 (55.0)

202 (45.0)

Yes

74 (14.1)

20 (27.0)

54 (73.0)

Diabetes

No

460 (88.0)

238 (51.7)

222 (48.3)

Yes

63 (12.0)

29 (46.0)

34 (54.0)

Cancer

No

339 (64.8)

181 (53.4)

158 (46.6)

Yes

184 (35.2)

86 (46.7)

98 (53.3)

Length of Hospital stay

<=5

180 (34.4)

110 (61.1)

70 (38.9)

5–10

186 (35.6)

100 (53.8)

86 (46.2)

> = 11

157 (30.0)

57 (36.3)

100 (63.7)

  1. ADR Adverse drug reaction
  2. aPIM Potentially inappropriate medication using 2020 Beer’s criteria
  3. bPolypharmacy: The use of five or more different active ingredients of medicines
  4. cDDI: Clinically significant drug-drug interaction using Lexi Comp
  5. dCCI: Charlison Comorbidity index for 10 years survival
  6. eKidney disease: any documented structural renal condition or eGFR< 90 mL/min/1.73m2