Table 1 Demographics of the NIA Dataset and Top-1 and Top-3 Accuracies of the Algorithm

From: Planet-wide performance of a skin disease AI algorithm validated in Korea

Category

Disease

NIA Dataset

Algo. (Binary)

Algo. (Multiclass)

No. of Images

No. of Cases

Average Age

Male (%)

TOP-1

TOP-3

TOP-1

TOP-3

Malignant Tumors

Basal cell carcinoma

2010

1804

69.0

48.4

62.1% (CI 60.0–64.3%)

81.6% (CI 79.9–83.3%)

55.9% (CI 53.7–58.1%)

73.1% (CI 71.1–75.0%)

Intraepithelial carcinoma (Bowen disease)

170

111

70.6

45.9

39.4% (CI 32.1–46.8%)

67.6% (CI 60.6–74.7%)

28.2% (CI 21.5–35.0%)

53.5% (CI 46.0–61.0%)

Malignant melanoma

825

734

63.7

51.1

49.0% (CI 45.6–52.4%)

73.9% (CI 70.9–76.9%)

47.3% (CI 43.9–50.7%)

66.8% (CI 63.6–70.0%)

Squamous cell carcinoma

1804

1601

74.2

48.5

50.2% (CI 47.9–52.5%)

77.3% (CI 75.3–79.2%)

33.3% (CI 31.1–35.5%)

60.0% (CI 57.7–62.2%)

Total (Malignant Tumors)

4250

4809

70.1

48.9

a50.2% b54.6%

a75.1% b78.2%

a41.2% b45.0%

a63.3% b66.4%

Benign Tumors

Actinic keratosis

1823

1405

73.7

37.4

92.9% (CI 91.7–94.1%)

58.1% (CI 55.8–60.4%)

40.9% (CI 38.7–43.2%)

69.9% (CI 67.8–72.0%)

Becker nevus

872

672

14.8

63.8

100.0% (CI 100.0–100.0%)

99.9% (CI 99.7–100.1%)

54.1% (CI 50.8–57.4%)

72.9% (CI 70.0–75.9%)

Blue nevus

113

105

33.0

45.7

92.9% (CI 88.2–97.6%)

71.7% (CI 63.4–80.0%)

60.2% (CI 51.2–69.2%)

75.2% (CI 67.3–83.2%)

Cafe au lait macule

2445

1648

5.7

45.0

100.0% (CI 100.0–100.0%)

99.9% (CI 99.7–100.0%)

51.7% (CI 49.8–53.7%)

77.5% (CI 75.9–79.2%)

Callus

1807

1472

54.7

40.0

99.5% (CI 99.2–99.8%)

97.7% (CI 97.0–98.4%)

28.4% (CI 26.3–30.5%)

70.3% (CI 68.2–72.4%)

Congenital nevus

1933

1546

8.1

47.2

98.8% (CI 98.3–99.3%)

84.6% (CI 83.0–86.2%)

51.8% (CI 49.6–54.0%)

76.0% (CI 74.1–78.0%)

Dermatofibroma

1245

1136

40.9

29.0

99.7% (CI 99.4–100.0%)

95.9% (CI 94.8–97.0%)

68.8% (CI 66.3–71.4%)

84.9% (CI 82.9–86.9%)

Epidermal cyst

2732

2516

36.4

53.7

99.3% (CI 99.0–99.6%)

97.4% (CI 96.8–98.0%)

52.1% (CI 50.2–54.0%)

74.5% (CI 72.9–76.2%)

Epidermal nevus

1256

801

10.1

49.4

99.9% (CI 99.8–100.1%)

98.9% (CI 98.3–99.5%)

45.9% (CI 43.1–48.6%)

68.1% (CI 65.5–70.7%)

Hemangioma

3710

3315

2.9

31.3

99.9% (CI 99.8–100.0%)

95.8% (CI 95.1–96.4%)

90.3% (CI 89.4–91.3%)

96.0% (CI 95.3–96.6%)

Hypertrophic scar

489

361

24.8

29.4

98.6% (CI 97.5–99.6%)

96.1% (CI 94.4–97.8%)

10.8% (CI 8.1–13.6%)

57.9% (CI 53.5–62.2%)

Juvenile xanthogranuloma

1050

753

2.8

60.6

100.0% (CI 100.0–100.0%)

99.2% (CI 98.7–99.8%)

51.1% (CI 48.1–54.2%)

68.5% (CI 65.7–71.3%)

Keloid

2262

1494

29.5

42.8

99.2% (CI 98.8–99.5%)

94.0% (CI 93.0–95.0%)

45.8% (CI 43.8–47.9%)

68.7% (CI 66.8–70.6%)

Lentigo

1878

890

59.2

20.2

99.8% (CI 99.7–100.0%)

98.0% (CI 97.3–98.6%)

48.7% (CI 46.5–51.0%)

80.2% (CI 78.4–82.0%)

Melanocytic nevus

3803

2949

25.8

41.0

98.3% (CI 97.9–98.7%)

81.2% (CI 80.0–82.5%)

69.8% (CI 68.3–71.2%)

91.5% (CI 90.6–92.4%)

Melanonychia

2162

1448

16.5

53.8

99.9% (CI 99.7–100.0%)

83.5% (CI 81.9–85.1%)

58.3% (CI 56.2–60.4%)

79.7% (CI 78.0–81.4%)

Milia

1155

459

44.1

22.7

100.0% (CI 100.0–100.0%)

99.3% (CI 98.8–99.8%)

27.6% (CI 25.0–30.2%)

58.1% (CI 55.2–60.9%)

Nevus depigmentosus

1911

1362

3.9

51.8

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

37.3% (CI 35.1–39.5%)

82.4% (CI 80.7–84.1%)

Orgarnoid nevus

1334

1233

10.4

51.8

100.0% (CI 100.0–100.0%)

97.7% (CI 96.9–98.5%)

78.4% (CI 76.2–80.6%)

90.9% (CI 89.4–92.5%)

Ota nevus

949

718

8.7

38.2

100.0% (CI 100.0–100.0%)

99.1% (CI 98.4–99.7%)

40.5% (CI 37.3–43.6%)

61.5% (CI 58.4–64.6%)

Portwine stain

2689

1997

9.2

43.1

100.0% (CI 100.0–100.0%)

99.4% (CI 99.2–99.7%)

62.7% (CI 60.9–64.5%)

85.1% (CI 83.7–86.4%)

Pyogenic granuloma

657

630

17.1

52.2

99.1% (CI 98.4–99.8%)

89.6% (CI 87.3–92.0%)

53.3% (CI 49.5–57.1%)

81.4% (CI 78.5–84.4%)

Sebaceus hyperplasia

1340

609

53.2

75.9

99.8% (CI 99.5–100.0%)

96.2% (CI 95.2–97.2%)

32.1% (CI 29.6–34.6%)

60.2% (CI 57.6–62.8%)

Seborrheic keratosis

2551

1982

63.7

53.5

97.9% (CI 97.4–98.5%)

80.2% (CI 78.7–81.8%)

58.8% (CI 56.9–60.7%)

82.5% (CI 81.0–84.0%)

Skin tag

1236

798

49.3

54.0

99.7% (CI 99.4–100.0%)

99.4% (CI 98.9–99.8%)

34.1% (CI 31.5–36.8%)

63.6% (CI 60.9–66.3%)

Syringoma

1268

552

44.2

14.9

100.0% (CI 100.0–100.0%)

99.5% (CI 99.1–99.9%)

25.8% (CI 23.4–28.2%)

53.5% (CI 50.8–56.3%)

Total (Benign Tumors)

32,851

44,670

26.8

44.1

a99.0% b99.2%

a92.8% b92.4%

a49.2% b53.5%

a74.3% b77.6%

Infectious Disorders

cWart

3551

2435

20.7

60.0

99.2% (CI 98.9–99.5%)

95.2% (CI 94.5–95.9%)

64.7% (CI 63.1–66.2%)

81.7% (CI 80.4–83.0%)

Acne

6537

3235

21.4

51.1

99.9% (CI 99.9–100.0%)

99.7% (CI 99.5–99.8%)

62.2% (CI 61.0–63.3%)

87.9% (CI 87.1–88.6%)

Folliculitis

1780

1005

38.0

73.7

99.9% (CI 99.8–100.1%)

99.2% (CI 98.8–99.6%)

39.8% (CI 37.6–42.1%)

71.3% (CI 69.2–73.4%)

Herpes simplex

1450

887

34.0

45.5

97.2% (CI 96.3–98.0%)

89.9% (CI 88.3–91.4%)

13.7% (CI 12.0–15.5%)

32.2% (CI 29.8–34.6%)

Herpes zoster

421

387

53.3

46.8

97.6% (CI 96.2–99.1%)

96.7% (CI 95.0–98.4%)

49.9% (CI 45.1–54.7%)

65.6% (CI 61.0–70.1%)

Impetigo

1755

745

6.0

58.4

99.4% (CI 99.1–99.8%)

96.1% (CI 95.2–97.0%)

28.0% (CI 25.9–30.1%)

42.6% (CI 40.3–44.9%)

Ingrown nail

765

636

15.1

60.2

100.0% (CI 100.0–100.0%)

99.7% (CI 99.4–100.1%)

52.5% (CI 49.0–56.1%)

74.6% (CI 71.6–77.7%)

Molluscum contagiosum

2943

1653

7.1

52.8

100.0% (CI 99.9–100.0%)

99.7% (CI 99.5–99.9%)

55.8% (CI 54.0–57.6%)

78.6% (CI 77.1–80.0%)

onychomycosis

2865

1212

43.9

53.5

100.0% (CI 100.0–100.0%)

99.9% (CI 99.8–100.0%)

73.8% (CI 72.1–75.4%)

94.8% (CI 93.9–95.6%)

Pityriasis rosea

1355

675

28.9

49.6

99.8% (CI 99.5–100.0%)

99.3% (CI 98.9–99.8%)

31.7% (CI 29.2–34.1%)

58.2% (CI 55.5–60.8%)

Tinea corporis

483

317

45.7

55.2

98.8% (CI 97.8–99.7%)

97.1% (CI 95.6–98.6%)

42.4% (CI 38.0–46.9%)

62.5% (CI 58.2–66.8%)

Tinea pedis

248

155

48.3

64.5

98.0% (CI 96.2–99.7%)

94.4% (CI 91.5–97.2%)

29.0% (CI 23.4–34.7%)

48.4% (CI 42.2–54.6%)

Tinea versicolor

2009

1043

21.9

73.2

100.0% (CI 100.0–100.0%)

99.8% (CI 99.6–100.0%)

7.8% (CI 6.6–8.9%)

20.8% (CI 19.0–22.6%)

Varicella

1042

375

11.3

65.1

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

25.5% (CI 22.9–28.2%)

43.8% (CI 40.7–46.8%)

Verruca plana

170

73

33.2

42.5

100.0% (CI 100.0–100.0%)

98.8% (CI 97.2–100.4%)

0.0% (CI 0.0–0.0%)

8.8% (CI 4.6–13.1%)

Total (Infectious Disorders)

14,833

27,374

24.2

56.8

a99.3% b99.6%

a97.7% b98.2%

a38.5% b48.4%

a58.1% b69.8%

Allergic Disorders

Atopic dermatitis

20,449

10,440

14.1

64.9

99.9% (CI 99.9–100.0%)

99.6% (CI 99.5–99.7%)

47.5% (CI 46.8–48.2%)

67.7% (CI 67.1–68.4%)

Contact dermatitis

2206

1022

46.8

36.3

100.0% (CI 100.0–100.0%)

98.9% (CI 98.4–99.3%)

16.1% (CI 14.6–17.7%)

47.9% (CI 45.8–50.0%)

Insect bite

1319

730

9.6

52.5

100.0% (CI 100.0–100.0%)

99.4% (CI 99.0–99.8%)

15.4% (CI 13.4–17.3%)

38.7% (CI 36.0–41.3%)

Lichen simplex chronicus

151

59

51.4

47.5

99.3% (CI 98.0–100.6%)

97.4% (CI 94.8–99.9%)

3.3% (CI 0.5–6.2%)

29.8% (CI 22.5–37.1%)

Nummular eczema

3725

1844

25.7

53.6

99.3% (CI 99.0–99.5%)

96.2% (CI 95.6–96.8%)

21.7% (CI 20.4–23.0%)

40.2% (CI 38.7–41.8%)

Pompholyx

983

363

17.4

46.3

99.9% (CI 99.7–100.1%)

99.4% (CI 98.9–99.9%)

17.2% (CI 14.8–19.6%)

49.0% (CI 45.9–52.2%)

Prurigo nodularis

2684

924

18.3

62.7

99.8% (CI 99.7–100.0%)

99.1% (CI 98.7–99.4%)

36.7% (CI 34.8–38.5%)

57.5% (CI 55.7–59.4%)

Seborrheic dermatitis

1566

843

45.2

53.9

99.7% (CI 99.5–100.0%)

98.4% (CI 97.8–99.0%)

10.5% (CI 9.0–12.0%)

29.3% (CI 27.1–31.6%)

Urticaria

3020

1340

23.3

58.2

100.0% (CI 100.0–100.0%)

99.7% (CI 99.5–99.9%)

47.0% (CI 45.2–48.8%)

68.4% (CI 66.8–70.1%)

Urticaria pigmentosa

1718

1030

1.7

63.0

99.9% (CI 99.7–100.0%)

99.4% (CI 99.1–99.8%)

40.2% (CI 37.9–42.5%)

58.5% (CI 56.2–60.8%)

Total (Allergic Disorders)

18,595

37,821

18.6

60.1

a99.8% b99.8%

a98.7% b99.1%

a25.6% b38.4%

a48.7% b59.5%

Miscellaneous

Alopecia areata

4237

3014

22.7

53.7

100.0% (CI 100.0–100.0%)

99.8% (CI 99.7–100.0%)

69.3% (CI 67.9–70.7%)

91.9% (CI 91.1–92.7%)

Androgenic alopecia

2150

1928

40.9

99.8

100.0% (CI 100.0–100.0%)

99.9% (CI 99.8–100.0%)

87.5% (CI 86.1–88.9%)

98.4% (CI 97.9–98.9%)

Guttate psoriasis

354

184

32.3

38.6

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

44.1% (CI 38.9–49.2%)

71.5% (CI 66.8–76.2%)

Idiopathic guttate hypomelanosis

1639

762

62.1

26.9

100.0% (CI 100.0–100.0%)

99.2% (CI 98.8–99.6%)

39.3% (CI 36.9–41.7%)

65.8% (CI 63.5–68.1%)

Lichen striatus

1732

1211

7.1

36.3

99.9% (CI 99.7–100.0%)

99.9% (CI 99.7–100.0%)

62.3% (CI 60.0–64.6%)

80.6% (CI 78.7–82.5%)

Nail dystrophy

3239

1549

18.9

52.2

100.0% (CI 100.0–100.0%)

99.7% (CI 99.5–99.9%)

58.6% (CI 56.9–60.3%)

95.5% (CI 94.7–96.2%)

Onycholysis

182

84

45.8

39.3

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

72.5% (CI 66.0–79.0%)

94.5% (CI 91.2–97.8%)

Palmoplantar pustulosis

159

109

46.9

33.9

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

77.4% (CI 70.9–83.9%)

96.9% (CI 94.1–99.6%)

Parapsoriasis

154

116

45.2

45.7

99.4% (CI 98.1–100.6%)

98.7% (CI 96.9–100.5%)

40.3% (CI 32.5–48.0%)

67.5% (CI 60.1–74.9%)

Pityriasis lichenoides chronica

2051

818

12.0

64.4

100.0% (CI 100.0–100.0%)

99.8% (CI 99.6–100.0%)

7.0% (CI 5.9–8.1%)

36.4% (CI 34.3–38.5%)

Pityriasis lichenoides et varioliformis acuta

482

213

11.3

71.8

100.0% (CI 100.0–100.0%)

100.0% (CI 100.0–100.0%)

10.2% (CI 7.5–12.9%)

36.1% (CI 31.8–40.4%)

Psoriasis

11,073

5258

33.2

65.0

99.6% (CI 99.4–99.7%)

97.6% (CI 97.3–97.9%)

44.6% (CI 43.7–45.6%)

65.4% (CI 64.5–66.3%)

Rosacea

2450

1321

50.9

22.5

99.9% (CI 99.7–100.0%)

99.3% (CI 99.0%-99.7%)

44.9% (CI 42.9%-46.9%)

77.2% (CI 75.5%-78.8%)

Scar

2887

2183

21.6

35.1

99.0% (CI 98.6–99.4%)

96.2% (CI 95.5–96.9%)

32.1% (CI 30.4–33.8%)

56.7% (CI 54.9–58.5%)

Vitiligo

4980

2725

25.7

54.1

99.9% (CI 99.9–100.0%)

99.3% (CI 99.1–99.5%)

62.3% (CI 61.0–63.7%)

83.6% (CI 82.6–84.6%)

Total (Miscellaneous)

21,475

37,769

29.0

55.1

a99.8% b99.8%

a99.3% b98.8%

a50.2% b50.8%

a74.5% b74.4%

Total

 

152,443

92,004

27.2

52.2

a96.6% b98.2%

a95.1% b96.2%

a43.3% b47.9%

a66.6% b70.6%

  1. A 95% confidence interval (CI) was reported using the binomial distribution method. Binary class accuracy refers to the correctness of predictions in determining whether a case is cancerous or not, while multi-class accuracy measures the correctness of predictions in identifying the specific disease name accurately. Only four major skin cancer types were included under the category of malignancy, and other rare or less common skin cancers were not covered in the NIA dataset.
  2. aMicro-averaged.
  3. bMacro-averaged
  4. cWart is included in both benign tumors and infectious diseases.