TABLE 3.
HRs and 95% CIs for total mortality of women participating in the Västerbotten Intervention Programme during 1990–2016 classified into quintiles according to diet quality calculated by various versions of the nutrient density score NRF index1
| Women (n = 49,124) | ||||||
|---|---|---|---|---|---|---|
| NRF9.32 | P | NRF11.32 | P | NRF21.32 | P | |
| Neither capped nor weighted | ||||||
| Q1 | 1.00 | 1.00 | 1.00 | |||
| Q5, HR mortality (95% CI) | 0.91 (0.81, 1.03) | 0.136 | 0.89 (0.79, 1.00) | 0.057 | 0.99 (0.88, 1.11) | 0.873 |
| Capped | ||||||
| Q1 | 1.00 | 1.00 | 1.00 | |||
| Q5, HR mortality (95% CI) | 0.86 (0.76, 0.97) | 0.015 | 0.83 (0.73, 0.93) | 0.002 | 0.89 (0.79, 1.01) | 0.070 |
| Weighted | ||||||
| Q1 | 1.00 | 1.00 | 1.00 | |||
| Q5, HR mortality (95% CI) | 0.91 (0.81, 1.02) | 0.116 | 0.90 (0.80, 1.02) | 0.097 | 0.95 (0.85, 1.07) | 0.405 |
| Capped and weighted | ||||||
| Q1 | 1.00 | 1.00 | 1.00 | |||
| Q5, HR mortality (95% CI) | 0.84 (0.75, 0.95) | 0.006 | 0.87 (0.77, 0.97) | 0.018 | 0.86 (0.76, 0.97) | 0.012 |
| Weighted and capped | ||||||
| Q1 | 1.00 | 1.00 | 1.00 | |||
| Q5, HR mortality (95% CI) | 0.85 (0.75, 0.96) | 0.008 | 0.82 (0.73, 0.93) | 0.002 | 0.87 (0.77, 0.98) | 0.020 |
HRs, 95% CIs, and P values estimated by Cox proportional hazards regression. NRF9.3 includes 9 qualitative nutrients (protein, fiber, vitamin A, vitamin C, vitamin E, calcium, iron, potassium, and magnesium) and 3 disqualitative nutrients (sodium, added sugars, and saturated fat) in the score. NRF11.3 includes 11 qualitative nutrients (protein, fiber, vitamin A, vitamin C, vitamin E, calcium, iron, potassium, magnesium, vitamin D, and folate) and 3 disqualitative nutrients (sodium, added sugars, and saturated fat) in the score. NRF21.3 includes 21 qualitative nutrients (protein, fiber, vitamin A, vitamin C, vitamin E, calcium, iron, potassium, magnesium, vitamin D, folate, thiamin, riboflavin, omega-3 fatty acids, niacin, vitamin B-6, vitamin B-12, phosphorus, iodine, selenium, and zinc) and 3 disqualitative nutrients (sodium, added sugars, and saturated fat) in the score. Ranking into quintiles was adjusted by age groups. Q1 is the lowest quintile and Q5 the highest quintile. Q1 is the reference category. NRF index, Nutrient Rich Foods index; Q, quintile.
Adjusted for age, age squared, BMI, physical activity, educational level, smoking status, and year of participation.