Table 2.
Characteristics and outcomes of included participants according to Acute Kidney Injury stage
| Characteristics Median [IQR] Number (proportion %) |
No AKI 2165 |
All AKI 683 |
Stage 1 483 |
Stage 2 135 |
Stage 3 64 |
P value No AKI vs. All AKI |
|---|---|---|---|---|---|---|
| Age, years | 82.6 [75.2 to 87.9] |
85.0 [78.6 to 89.8] |
85.5 [78.6 to 89.9] |
84.3 [78.5 to 89.6] |
83.9 [77.4 to 88.9] |
<0.001 |
| Male | 562 (26.0) |
214 (31.3) |
154 (31.9) |
38 (27.9) |
22 (34.4) |
<0.001 |
| Number (%) with known baseline SCr | 1587 (73.3) |
457 (66.9) |
342 (70.8) |
75 (55.0) |
40 (62.5) |
0.001 |
| Baseline eGFR mls/min/1.73 m2 | 64 [50 to 77] |
57 [43 to 74] |
57 [42 to 72] |
63 [48 to 72] |
58 [37 to 81] |
<0.001 |
| CKD stage > =3 | 658/1587 (41.5) |
243/457 (53.1) |
186/342 (54.3) |
36/75 (48) |
21/40 (52.5) |
<0.001 |
| Diabetes | 266 (12.3) |
127 (18.6) |
84 (17.4) |
28 (20.7) |
15 (23.4) |
<0.0001 |
| Previous Stroke or TIA | 271 (11.9) |
104 (15.2) |
72 (14.9) |
19 (14.1) |
13 (20.3) |
0.069 |
| Cardiovascular disease | 1157 (52.8) |
438 (64.1) |
301 (62.3) |
92 (68.1) |
45 (70.3) |
<0.0001 |
| Greater than one defined co-morbidity | 658 (30.3) |
301 (44.1) |
205 (42.4) |
61 (45.2) |
35 (54.7) |
<0.0001 |
| Admission AMTS <7 | 743 (34.3) |
244 (35.7) |
171 (35.4) |
49 (36.3) |
24 (37.5) |
0.5 |
| Admission haemoglobin < 100 g L-1 | 154 (7.1) |
61 (8.9) |
49 (10.1) |
8 (5.8) |
4 (6.3) |
0.13 |
| Not admitted from home | 441 (20.3) |
90 (18.6) |
32 (23.5) |
9 (14) |
131 (19.2) |
0.51 |
| Nottingham Hip Fracture Score | 4 [3–5] |
5 [4–6] |
5 [4–6] |
5 [4–6] |
5 [4–6] |
<0.0001 |
| Nottingham Hip Fracture Score > = 4 | 1544 (71.3) |
583 (85.4) |
414 (83.1) |
113 (83.1) |
56 (87.5) |
<0.0001 |
| Nottingham Hip Fracture Score > = 5 | 1044 (48.2) |
417 (61.1) |
302 (62.5) |
75 (66.4) |
40 (62.5) |
<0.001 |
AKI Acute Kidney Injury, AMTS Abbreviated mental test score
eGFR estimated glomerular filtration rate, SCr Serum creatinine
CKD Chronic kidney disease