Commonly confused in nursing
Type 1 Diabetes vs Type 2 Diabetes
A newly diagnosed diabetic in DKA needs insulin immediately — but a Type 2 patient admitted with HHS at glucose 900 may go home on metformin alone. Picking the wrong treatment pathway, or missing which emergency belongs to which type, costs points and endangers the client.
Which One Is It?
1 / 4 · score 0The finding: Autoantibodies + (GAD65, IA-2)
Side-by-side comparison
Side-by-side2 compared
Focus
Dimension
Type 1 Diabetes
Type 2 Diabetes
Pathophysiology & risk
- Autoimmune beta-cell destruction
- Absolute insulin deficiency
- Onset childhood–young adult
- Usually lean build
- Insulin resistance + relative deficiency
- Onset > 40 yr (rising in obese youth)
- Overweight/obese, central adiposity
Signs & symptoms
- Abrupt polyuria, polydipsia, polyphagia
- Unexplained weight loss
- May present in DKA
- Insidious onset
- Often asymptomatic at diagnosis
- Recurrent infections, slow healing
- Acanthosis nigricans
Diagnostics & labs
- A1C ≥ 6.5% / FPG ≥ 126 mg/dL
- ★Autoantibodies + (GAD65, IA-2)
- C-peptide low/undetectable
- A1C ≥ 6.5% / FPG ≥ 126 mg/dL
- Autoantibodies absent
- C-peptide normal/high early
Nursing priorities
- ★Insulin from day one — never omit
- Match insulin to carbs/activity
- Watch for DKA (ketones)
- Lifestyle + metformin first-line
- Step up agents per A1C
- Watch for HHS (no ketosis)
Treatment & meds
- Basal-bolus regimen or insulin pump
- No oral agents alone
- Metformin first
- Add GLP-1 RA or SGLT2 inhibitor
- Insulin as beta-cell function declines
Patient teaching
- Sick day: never skip insulin
- Treat lows: 15-15 rule
- Daily foot care
- Weight loss, diet, exercise
- Daily foot care
- May need insulin later — not a failure
- Treat lows: 15-15 rule
Red flags — escalate
- ★DKA: glucose ≥ 250, ketones, Kussmaul
- Severe hypoglycemia
- ★HHS: glucose > 600, osm > 320
- Sulfonylurea: prolonged hypoglycemia
- Severe hypoglycemia
Complications
- DKA
- Retinopathy, nephropathy, neuropathy
- Macrovascular: CAD, stroke, PAD
- HHS
- Macrovascular: CAD, stroke, PAD
- Retinopathy, nephropathy, neuropathy
Pathophysiology & risk
Type 1 Diabetes
- Autoimmune beta-cell destruction
- Absolute insulin deficiency
- Onset childhood–young adult
- Usually lean build
Type 2 Diabetes
- Insulin resistance + relative deficiency
- Onset > 40 yr (rising in obese youth)
- Overweight/obese, central adiposity
Signs & symptoms
Type 1 Diabetes
- Abrupt polyuria, polydipsia, polyphagia
- Unexplained weight loss
- May present in DKA
Type 2 Diabetes
- Insidious onset
- Often asymptomatic at diagnosis
- Recurrent infections, slow healing
- Acanthosis nigricans
Diagnostics & labs
Type 1 Diabetes
- A1C ≥ 6.5% / FPG ≥ 126 mg/dL
- ★Autoantibodies + (GAD65, IA-2)
- C-peptide low/undetectable
Type 2 Diabetes
- A1C ≥ 6.5% / FPG ≥ 126 mg/dL
- Autoantibodies absent
- C-peptide normal/high early
Nursing priorities
Type 1 Diabetes
- ★Insulin from day one — never omit
- Match insulin to carbs/activity
- Watch for DKA (ketones)
Type 2 Diabetes
- Lifestyle + metformin first-line
- Step up agents per A1C
- Watch for HHS (no ketosis)
Treatment & meds
Type 1 Diabetes
- Basal-bolus regimen or insulin pump
- No oral agents alone
Type 2 Diabetes
- Metformin first
- Add GLP-1 RA or SGLT2 inhibitor
- Insulin as beta-cell function declines
Patient teaching
Type 1 Diabetes
- Sick day: never skip insulin
- Treat lows: 15-15 rule
- Daily foot care
Type 2 Diabetes
- Weight loss, diet, exercise
- Daily foot care
- May need insulin later — not a failure
- Treat lows: 15-15 rule
Red flags — escalate
Type 1 Diabetes
- ★DKA: glucose ≥ 250, ketones, Kussmaul
- Severe hypoglycemia
Type 2 Diabetes
- ★HHS: glucose > 600, osm > 320
- Sulfonylurea: prolonged hypoglycemia
- Severe hypoglycemia
Complications
Type 1 Diabetes
- DKA
- Retinopathy, nephropathy, neuropathy
- Macrovascular: CAD, stroke, PAD
Type 2 Diabetes
- HHS
- Macrovascular: CAD, stroke, PAD
- Retinopathy, nephropathy, neuropathy
★ marks the fact that sets a column apart.
Clinical Pearl
Type 1 = no insulin, makes ketones; Type 2 = has insulin, makes hyperosmolarity.
Play this as a game — free
Drill Type 1 Diabetes vs Type 2 Diabetes in Swipe Right & Speed Sort. Free to start, no card required.
More commonly confused pairs
Keep going
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