Replicability and reproducibility of predictive models for diagnosis of depression among young adults using Electronic Health Records

Table 2 Predictor variables that were removed/retained following the backward stepwise selection procedure

	Female 15–18		Female 19–24		Male 15–18		Male 19–24
Predictor	NRCBM	Rep	NRCBM	Rep	NRCBM	Rep	NRCBM	Rep
imd quintile	✓	✓	✓	✓	✓		✓	✓
Abdominal pain	✓		✓				✓
Alcohol misuse			✓	✓			✓	✓
Anxiety	✔	✔	✔	✔	✔	✔	✔	✔
Asthma			✓	✓				✓
Back pain, with specific symptoms			✓	✓				✓
Back pain without specific symptoms	✓		✓	✓	✓		✓	✓
Bed wetting					✓
Bereavement	✔	✔	✔	✔	✔	✔	✔	✔
Carer (young)				✓
Count	✔	✔	✔	✔	✔	✔	✔	✔
Developmental issues							✓
Diabetes		✓	✓	✓		✓	✓	✓
Drug misuse		✓	✓	✓	✓	✓	✓	✓
Dysmenorrhea			✓		n/a	n/a	n/a	n/a
Dyspepsia	✔	✔	✔	✔	✔	✔	✔	✔
Eating disorders	✓	✓	✓	✓			✓	✓
Emotion (childhood problems)
Epilepsy							✓
Excessive sweating			✓
Headache	✔	✔	✔	✔	✔	✔	✔	✔
Homeless								✓
Ill-defined conditions		✓		✓
Loss of enjoyment			✓	✓				✓
Low mood	✔	✔	✔	✔	✔	✔	✔	✔
Missing smoker data	✔	✔	✔	✔	✔	✔	✔	✔
Missed immunization
Neonatal problems			✓				✓
Non-accidental injury	✓	✓	✓	✓	✓	✓	✓
OCD	✔	✔	✔	✔	✔	✔		✔
Other somatic symptoms		✓		✓
Psychosexual problems							✓	✓
PTSD	✓	✓	✓	✓		✓	✓	✓
Puberty (early/late)
School problems	✓	✓			✓	✓
Self-harm	✔	✔	✔	✔	✔	✔	✔	✔
Skin problems		✓		✓		✓		✓
Sleep, too little	✔	✔	✔	✔	✔	✔	✔	✔
Sleep, too much		✓		✓				✓
Smoker	✔	✔	✔	✔	✔	✔	✔	✔
Social services involvement				✓	✓			✓
Tiredness	✓	✓	✓	✓	✓		✓
Weight gain
Weight loss			✓			✓	✓	✓
Work stress			✓	✓			✓	✓
Total (of 48)	22	26	32	33	22	18	29	31
Common predictors (n)	20		27		14		23
Correlation (phi)	0.66		0.46		0.59		0.39

Note 1: Dysmenorrhea does not present in males
Note 2: Predictors in bold common across all models in both NRCBM and this replication
Note 3: For interpretation of phi: 0.01 to 0.19—no or negligible, 0.20 to 0.29—weak, 0.30 to 0.39—moderate, 0.40 to 0.69—strong 0.70 or higher-very strong positive relationship [58]

ISSN: 2397-7523