Table 1.
Descriptive statistics for the 184 countries.
| Median | Mean | IQR | Standard deviation | Range | |
|---|---|---|---|---|---|
| All Countries (n = 184) | |||||
| Prevalence of MDD (cases per 100 people) | 5.1 | 5.3 | 4.4, 6.0 | 1.8 | 2.5, 22.5 |
| Total LC Omega-3 PUFA (mg/day)a | 262 | 343 | 155, 404 | 380 | 35, 3918 |
| Gross national incomeb | 2.0 | 1.6 | 1.0, 2.5 | 1.1 | 0.0, 3.0 |
| PTB rate (PTBs per 100 live births) | 10.2 | 10.2 | 7.7, 12.4 | 3.0 | 4.1, 18.1 |
| Countries excluding outliersc (n = 182) | |||||
| Prevalence of MDD (cases per 100 people) | 5.1 | 5.2 | 4.4, 6.0 | 1.3 | 2.5, 9.3 |
| Total LC omega-3 PUFA (mg/day)b | 262 | 324 | 156, 403 | 273 | 35, 2011 |
| Gross national incomec | 2.0 | 1.6 | 1.0, 3.0 | 1.1 | 0.0, 3.0 |
| PTB rate (PTBs per 100 live births) | 10.2 | 10.2 | 7.6, 12.4 | 3.0 | 4.1, 18.1 |
aLC Omega-3 PUFA = seafood based intake + (plant based intake × 0.15).
bGross National Income coded as a variable with 4 levels using the World Bank Atlas Method (0 = low income, 3 = high income).
cTwo countries were excluded as outliers: Afghanistan (MDD prevalence outlier: 22.5 cases per 100 people; over 9 SD from the global mean) and the Maldives (LC Omega-3 PUFA outlier: 3918 mg/day; over 9 SD from the global mean).