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. 2024 Feb 16;8:e53316. doi: 10.2196/53316

Table 2.

Frequency of reported symptoms and conditions.


Name ICDa code type Frequency, n (%)
1 Deficiency of multiple nutrient elements E 139 (37.9)
2 Vitamin D deficiency, unspecified E 93 (25.3)
3 Other fatigue R 82 (22.3)
4 Anxiety disorder, unspecified F 81 (22.1)
5 Hypothyroidism, unspecified E 81 (22.1)
6 Chronic fatigue, unspecified R 65 (17.7)
7 Essential fatty acid deficiency E 64 (17.4)
8 Pure hypercholesterolemia, unspecified E 62 (16.9)
9 Other abnormal glucose R 52 (14.2)
10 Irritable bowel syndrome with diarrhea K 51 (13.9)
11 Autoimmune thyroiditis E 50 (13.6)
12 Mixed irritable bowel syndrome K 50 (13.6)
13 Abnormal level of hormones in specimens from other organ or tissue R 47 (12.8)
14 Other disorders involving the immune mechanism, Not elsewhere classified. D 45 (12.3)
15 Gastroesophageal reflux disease without esophagitis K 41 (11.2)
16 Essential (primary) hypertension I 39 (10.6)
17 Major depressive disorder, recurrent, unspecified F 39 (9.3)
18 Disorder involving the immune mechanism, unspecified D 36 (9.8)
19 Irritable bowel syndrome with constipation K 34 (9.3)
20 Impaired glucose tolerance (oral) R 32 (8.7)

aICD: International Classification of Diseases.