Characteristics of the patients hospitalized at least once for type 1 diabetes, 1975–2004, Sweden
| Women | Men | Total | |
|---|---|---|---|
| n | 15,001 | 16,353 | 31,354 |
| Age at enrollment (years) | 19.9 ± 11.3 | 19.6 ± 11.1 | 19.7 ± 11.1 |
| Mean calendar year at entry | 1990 | 1991 | 1991 |
| Follow-up duration (years) | 13.1 ± 7.6 | 12.0 ± 7.4 | 12.5 ± 7.5 |
| Person-years accumulated | 196,928 | 196,206 | 393,134 |
| Patients with (%) | |||
| Ophthalmic complications* | 20.6 | 16.4 | 18.4 |
| Diabetic nephropathy† | 9.2 | 8.5 | 8.8 |
| Neurological complications‡ | 7.1 | 7.1 | 7.1 |
| No. of nontraumatic LEAs§ | 201 | 264 | 465 |
| Amputation above knee | 18 | 11 | 29 |
| Amputation below knee | 82 | 111 | 193 |
| Amputation below ankle | 101 | 142 | 243 |
| Age at diagnosis (years) | 45.1 ± 7.6 | 45.6 ± 8.1 | 45.4 ± 7.8 |
Data are means ± SD unless indicated otherwise.
↵* Ophthalmic complications defined by ICD-7 codes 260.20, 260.21, and 260.29, ICD-8 codes 250.01, 250.02, and 250.03, ICD-9 code 250E, and ICD-10 codes E10.3, E11.3, E12.3, E13.3, and E14.3.
↵† Diabetic nephropathy defined by ICD-7 code 260.30, ICD-8 code 250.40, ICD-9 code 250D, and ICD-10 codes E10.2, E11.2, E12.2, E13.2, and E14.2.
↵‡ Neurological complications defined by ICD-7 codes 260.40 and 260.49, ICD-8 code 250.05, ICD-9 code 250F, and ICD-10 codes E10.4, E11.4, E12.4, E13.4, and E14.4.
↵§ LEA defined by the operation code: amputation below the ankle was defined by operation codes 8750 or 8760 before 1998 and NHQ16, NHQ17, NHQ12, NHQ13, NHQ14, or NHQ99 afterwards; amputation above the ankle but below the knee was defined by operation codes 8770 or 8771 before 1998 and NGQ19, NHQ09, NHQ11, or NGQ99 afterwards; and amputation above the knee was defined by operation codes 8780 or 8781 before 1998 and NGQ09, NFQ19, or NFQ99 afterwards. Traumatic amputations of the lower-extremity were excluded.