Table 1

Baseline characteristics of patients, stratified by HbA1c decile group

12345678910All
n2,4762,4742,5132,4462,5912,3502,4762,4752,4752,47424,750
Mean HbA1c, % (range)6.5 (4.4–7.1)7.4 (7.1–7.7)7.9 (7.7–8.1)8.2 (8.1–8.4)8.6 (8.4–8.7)8.9 (8.7–9.0)9.2 (9.0–9.4)9.7 (9.4–9.9)10.3 (9.9–10.8)12.0 (10.8–18.4)8.9 (4.4–18.4)
Male (%)1,449 (59)1,453 (59)1,428 (57)1,393 (57)1,452 (56)1,330 (57)1,362 (55)1,383 (56)1,353 (55)1,289 (52)13,892 (56)
Age, years (SD)41 (17)41 (17)40 (17)39 (17)39 (17)37 (17)37 (18)38 (17)38 (16)33 (14)38 (17)
Previous vascular disease (%)140 (6)171 (7)155 (6)140 (6)195 (8)155 (7)166 (7)174 (7)179 (7)145 (6)1,620 (7)
Mean creatinine, µmol/L (SD)104 (82)105 (88)99 (70)99 (67)100 (75)97 (63)103 (75)103 (75)102 (63)99 (63)101 (73)
Mean BMI* (SD)28 (6)27 (5)27 (5)27 (5)27 (5)27 (5)27 (5)27 (5)27 (6)26 (6)27 (5)
Median diabetes duration, years (IQR)11 (2–23)14 (5–26)14 (5–24)14 (5–26)13 (5–24)13 (5–24)14 (6–25)14 (7–24)13 (6–22)10 (4–17)13 (5–24)
Admitted (%)1,070 (43)1,021 (41)1,071 (43)1,065 (44)1,162 (45)1,192 (51)1,282 (52)1,239 (52)1,385 (56)1,569 (63)12,058 (49)
Total admissions (per patient)3,229 (3.0)2,647 (2.6)2,566 (2.4)2,814 (2.6)2,953 (2.5)3,157 (2.7)3,303 (2.6)3,475 (2.8)3,891 (2.8)5,481 (3.5)33,516 (2.8)
 Diabetes related1,890 (59)1,745 (66)1,846 (72)1,898 (67)2,068 (70)2,150 (68)2,523 (76)2,570 (74)3,108 (80)4,605 (84)24,403 (73)
 Hypoglycemic88 (2.7)98 (3.7)141 (5.5)121 (4.3)150 (5.1)142 (4.5)191 (5.8)166 (4.8)151 (3.9)172 (3.1)1,420 (4.2)
 DKA§118 (3.7)127 (4.8)196 (7.6)149 (5.3)302 (10.2)358 (11.3)429 (13.0)514 (14.8)807 (20.7)1,812 (33.1)4,812 (14.4)
 Dysglycemia226 (7.0)243 (9.2)350 (13.6)277 (9.8)468 (15.8)529 (16.8)636 (19.3)700 (20.1)1,005 (25.8)2,008 (36.6)6,442 (19.2)
 Vascular56 (1.7)67 (2.5)50 (2.0)59 (2.1)69 (2.3)61 (1.9)86 (2.6)62 (1.8)90 (2.3)56 (1.0)656 (2.0)
 Cancer382 (11.8)213 (8.1)130 (5.1)391 (13.9)284 (9.6)165 (5.2)138 (4.2)79 (2.3)89 (2.3)66 (1.2)1,937 (5.8)
  • HbA1c, creatinine, and BMI were the mean of any values recorded between January 2005/date of diagnosis and December 2007/date of death.

  • *BMI, kg/m2;

  • †total admissions over the period 2005–2007 and number of admissions per patient if they had at least one admission;

  • ‡percentage of total admissions;

  • §DKA;

  • ‖coma, DKA, or hypoglycemia.