Correlation and parameter estimates from linear regression for standardised incidence rates of childhood acute lymphoblastic leukaemia and type 1 diabetes from 40 countries for specific national characteristics
| Factor | Acute lymphoblastic leukaemia | Type 1 diabetes | ||||
|---|---|---|---|---|---|---|
| Correlation* (95% CI) | Parameter estimate (95% CI) | Adjusted R2 | Correlation* (95% CI) | Parameter estimate (95% CI) | Adjusted R2 | |
| *Pearson’s product moment correlation coefficient. | ||||||
| †Logarithmic transformation used; ‡inverse transformation used. | ||||||
| Gross domestic product† (1994, US$ per head) | 0.47 (0.19 to 0.68) | 0.69 (0.27 to 1.11) | 0.20 | 0.44 (0.15 to 0.66) | 4.94 (1.62 to 8.27) | 0.17 |
| Infant mortality‡ (1995, per 1000 live births) | 0.41 (0.12 to 0.64) | 6.16 (1.72 to 10.61) | 0.15 | 0.54 (0.27 to 0.73) | 61.8 (30.02 to 93.53) | 0.27 |
| Life expectancy (1995) | 0.42 (0.13 to 0.65) | 0.12 (0.03 to 0.20) | 0.15 | 0.31 (−0.01 to 0.56) | 0.65 (−0.02 to 1.31) | 0.07 |
| Population density† (ages 0–14 per km2) | −0.19 (−0.47 to 0.13) | −0.14 (−0.39 to 0.11) | 0.01 | −0.37 (−0.61 to −0.07) | −2.23 (−4.05 to −0.41) | 0.12 |
| Coffee consumption (1990/91, 60 kg bags per 1000 head) | 0.38 (0.03 to 0.65) | 0.0061 (0.00046 to 0.01) | 0.11 | 0.61 (0.33 to 0.79) | 0.087 (0.04 to 0.13) | 0.35 |
| Milk consumption (liquid, 1990s, kg per head) | 0.41 (0.05 to 0.67) | 0.014 (0.0016 to 0.03) | 0.13 | 0.71 (0.46 to 0.85) | 0.18 (0.11 to 0.25) | 0.48 |
| Latitude (degrees from equator, capital) | 0.22 (−0.10 to 0.50) | 0.016 (−0.079 to 0.04) | 0.02 | 0.57 (0.31 to 0.75) | 0.33 (0.17 to 0.49) | 0.30 |
| Sunshine (average hours per day) | −0.20 (−0.48 to 0.12) | −0.13 (−0.35 to 0.09) | 0.01 | −0.33 (−0.58 to −0.02) | −1.69 (−3.30 to −0.09) | 0.08 |