Table 3

RRs and 95% CIs for non-Hodgkin’s lymphoma by the quintile group for intake of dietary fiber and folate in 1980

Quintile of nutrient intakeaQ5 95% CIdP for trende
12345
Total dietary fiber
No. of cases4935433537
Intake (g/day)9.813.115.919.124.9
RR
Age-adjusted1.000.690.820.620.630.41–0.960.04
Multivariate-adjustedb1.000.690.820.640.630.41–0.980.05
Multivariate-adjustedc1.000.700.860.710.820.51–1.330.52
Fruit fiber
No. of cases3749364334
Intake (g/day)1.02.33.65.38.5
RR
Age-adjusted1.001.260.860.990.760.47–1.220.07
Multivariate-adjustedb1.001.250.881.000.730.45–1.170.07
Multivariate-adjustedc1.001.290.951.150.960.58–1.600.65
Vegetable fiber
No. of cases4645374328
Intake (g/day)2.23.34.35.68.3
RR
Age-adjusted1.000.950.770.860.530.33–0.860.009
Multivariate-adjustedb1.000.950.760.860.540.34–0.870.01
Multivariate-adjustedc1.000.970.790.920.630.39–1.030.07
Folate from food and supplements
No. of cases4144293946
Intake (μg/day)158217277392698
RR
Age-adjusted1.000.990.630.810.970.64–1.480.71
Multivariate-adjustedb1.001.020.650.861.010.66–1.540.70
Multivariate-adjustedc1.001.090.751.091.230.79–1.920.20
Folate, food only
No. of cases3952362943
Intake (μg/day)151200240289379
RR
Age-adjusted1.001.260.820.660.920.59–1.430.17
Multivariate-adjustedb1.001.280.840.660.930.60–1.440.21
Multivariate-adjustedc1.001.360.950.791.280.79–2.070.80
  • a Values for intake are medians for each quintile.

  • b The multivariate models included age (5-year categories), total energy (quintiles), length of follow-up (seven periods), geographic region (Northeast, Midwest, South, California), cigarette smoking (never, past, present smoking of 1–14 cigarettes and≥ 15 cigarettes/day), and height (<62 inches, ≥62 to <64 inches,≥ 64 to <66 inches, ≥66 to <68 inches, or ≥68 inches).

  • c Additional adjustment for quintiles of saturated and trans unsaturated fats.

  • d Q5 95% CI = 95% CIs for quintile 5 RRs.

  • e Ps are two-sided (Wald’s test).