Background
Method
Databases
Patient sample
Available primary and secondary care data
Feature extraction
Data preparation
Data analysis
Exploratory data analysis
Cohort 2013–2016 (N = 930,590) | ||||||
Non-pSS (N = 929,179) | pSS (N = 1411) | |||||
Female (%) | 487,657 (52.5) | 1014 (71.9) | ||||
Mean age female ± SD | 45.9 ± 22.3 | 60.5 ± 16.9 | ||||
Mean age male ± SD | 45.0 ± 22.3 | 64.0 ± 15.9 | ||||
ICPC top 10 | Female non-pSS | Male non-pSS | Female pSS | Male pSS | ||
< 45 years (N = 219,619) | > 45 years (N = 268,038) | All ages (N = 441,522) | < 45 years (N = 182) | > 45 years (N = 832) | All ages (N = 397) | |
1. | General weakness (A04) | No disease (A97) | No disease (A97) | General weakness (A04) | General weakness (A04) | No disease (A97) |
2. | No disease (A97) | High blood pressure (K86) | High blood pressure (K86) | No disease (A97) | No disease (A97) | General weakness (A04) |
3. | Constipation (D12) | General weakness (A04) | General weakness (A04) | Stomach pain (D02) | Other general disease (A99) | Other general diseases (A99) |
4. | Generalized abd. Pain (D01) | Other general disease (A99) | Other general disease (A99) | Allergy (A12) | Allergy (A12) | Abnormal results (A91) |
5. | Allergy (A12) | Abnormal results (A91) | Excessive ear wax (H81) | Other local abd. Pain (D06) | High blood pressure (K86) | Stomach pain (D02) |
6. | Fever (A03) | Stomach pain (D02) | Allergy (A12) | Other general sympt. (A29) | Stomach pain (D02) | Constipation (D12) |
7. | Refractive errors (F91) | Other general sympt. (A29) | Abnormal results (A91) | Constipation (D12) | Abnormal results (A91) | High blood pressure (K86) |
8. | Other general disease (A99) | Excessive ear wax (H81) | Stomach pain (D02) | Accident/injury (A80) | Adverse effect meds (A85) | Other local abd. Pain (D06) |
9. | Other local abd. Pain (D06) | Allergy (A12) | Refractive errors (F91) | Iron deficiency anemia (B80) | Other general sympt. (A29) | Abnormal sensations eye (F13) |
10. | Upper resp. infection (R74) | Other local abd. Pain (D06) | Asthma (R96) | Irritable bowel syndr. (D93) | Other local abd. Pain (D06) | Allergy (A12) |
ATC-3 top 10 | Female non-pSS | Male non-pSS | Female pSS | Male pSS | ||
< 45 years (N = 219,619) | > 45 years (N = 268,038) | All ages (N = 441,522) | < 45 years (N = 182) | > 45 years (N = 832) | All ages (N = 397) | |
1. | Hormonal contraceptives (G03A) | Peptic ulcer and GORD (A02B) | Lipid modifying agents (C10A) | Hormonal contraceptives (G03A) | Peptic ulcer and GORD (A02B) | Peptic ulcer and GORD (A02B) |
2. | Antidepressants (N06A) | Lipid modifying agents (C10A) | Antithrombotic agents (B01A) | Antidepressants (N06A) | Lipid modifying agents (C10A) | Heparin group (B01A) |
3. | Antihistamines (R06A) | Beta blocking agents (C07A) | Peptic ulcer and GORD (A02B) | Peptic ulcer and GORD (A02B) | Antithrombotic agents (B01A) | Lipid modifying agents (C10A) |
4. | Anti-inflammatory and anti-rheumatic products, NS (M01A) | Antithrombotic agents (B01A) | Beta blocking agents (C07A) | Anti-inflammatory and anti-rheumatic products, NS (M01A) | Other ophthalmologicals (S01X) | Beta blocking agents (C07A) |
5. | Decongestants and other nasal preparations for topical use (R01A) | Antidepressants (N06A) | Blood glucose lowering drugs, excl insulins (A10B) | Other ophthalmologicals (S01X) | Beta blocking agents (C07A) | ACE inhibitors, plain (C09A) |
6. | Corticosteroids, plain (D07A) | Blood glucose lowering drugs, excl insulins (A10B) | ACE inhibitors, plain (C09A) | Decongestants and other nasal preparations for topical use (R01A) | Antidepressants (N06A) | Other ophthalmologicals (S01X) |
7. | Adrenergics, inhalants (R03A) | ACE inhibitors, plain (C09A) | Antidepressants (N06A) | Anxyiolytics (N05B) | Hypnotics and sedatives (N05C) | Drugs used in benign prostatic hypertrophy (G04C) |
8. | Beta-lactam antibacterials (J01C) | Anxyiolytics (N05B) | Anti-inflammatory and anti-rheumatic products, NS (M01A) | Antihistamines (R06A) | Blood glucose lowering drugs, excl insulins (A10B) | Blood glucose lowering drugs, excl insulins (A10B) |
9. | Drugs for constipation (A06A) | Anti-inflammatory and anti-rheumatic products, NS (M01A) | Adrenergics, inhalants (R03A) | Opioids (N02A) | Opioids (N02A) | Selective calcium channel blockers, vascular (C08C) |
10. | Peptic ulcer and GORD (A02B) | Hypnotics and sedatives (N05C) | Selective calcium channel blockers, vascular (C08C) | Corticosteroids, plain (D07A) | Calcium (A12A) | Anti-inflammatory and anti-rheumatic products, NS (M01A) |
Training and validating the algorithms
Logistic regression
Random forest
Results
Logistic regression
Logistic Regression | Random Forest | |
---|---|---|
1. | S01X (other ophthalmologicals) | Age |
2. | Age | S01X (other ophthalmologicals) |
3. | Gender | Number of GP consults < 20 min |
4. | S01A (anti-infectives for ophthalmological use) | Number of GP consults > 20 min |
5. | Number of GP consults > 20 min | Number of GP consults by phone |
6. | S01G (decongestants and anti-allergics for ophthalmological use) | A02B (drugs for peptic ulcer and gastro-oesopheagel reflux disease) |
7. | Number of GP visitations at home < 20 min | Gender |
8. | S01C (anti-inflammatory agents and anti-infectives in combination) | Repeat prescription |
9. | J01F (macrolides, lincosamides and streptogramins) | N02A (opioids) |
10. | A99 (other generalized/non-specified diseases) | M01A (Anti-inflammatory and anti-rheumatic products, NS) |
Secondary care | ||||
Non-pSS | pSS | Total | ||
Primary Care | Non-pSS | 85,895 [Tn] | 49 [Fn] | 85,944 |
pSS | 30,251 [Fp] | 128 [Tn] | 30,379 | |
Total | 116,146 | 177 | 116,323 |
Random forest
Secondary care | ||||
Non-pSS | pSS | Total | ||
Primary Care | Non-pSS | 90,513 [Tn] | 53 [Fn] | 90,566 |
pSS | 25,633 [Fp] | 124 [Tn] | 25,757 | |
Total | 116,146 | 177 | 116,323 |