Table 1.

Baseline characteristics for total fluid intake in 1986

Total fluid
Quartile 1Quartile 2Quartile 3Quartile 4
NHS women
    No. participants17,11017,39717,28116,950
    Median intake (mL/d)1,2581,7702,2172,874
    Age (y)*52.753.053.253.0
    BMI (kg/m2)*24.825.125.525.9
    Physical activity (METS/wk)*,12.413.214.516.0
    Alcohol intake (g/d)*4.55.46.48.3
    Animal fat (g/d)*32.832.732.732.6
    Dietary fiber (g/d)*,17.617.717.817.6
    Current smoker (%)16.718.922.326.4
    History of hypertension (%)22.624.425.226.3
    History of diabetes (%)2.93.54.14.5
    Current multivitamin user (%)38.041.343.946.2
HPFS men
    No. participants11,66212,13812,12811,990
    Median intake (mL/d)1,1371,6782,1602,906
    Age, mean (y)*54.954.754.653.5
    BMI (kg/m2)*25.125.325.626.1
    Physical activity (METS/wk)*,19.220.421.822.3
    Alcohol intake (g/d)*7.09.611.816.8
    Animal fat (g/d)*40.841.041.241.6
    Dietary fiber (g/d)*,21.921.320.920.1
    Current smoker (%)6.28.010.613.5
    History of hypertension (%)21.221.222.223.5
    History of diabetes (%)2.62.83.14.3
    Current multivitamin user (%)39.341.441.744.4
  • NOTE: Values, except for the number of participants, fluid median intake, and age, are standardized according to the age distribution of cohort.

    Abbreviation: MET, metabolic equivalents.

  • * Mean values. Animal fat and dietary fiber values represent the mean energy-adjusted intake.

  • One MET is the energy expended by sitting quietly. Each activity was assigned a MET value, e.g., swimming = 7 METS and running = 12 METS. Total METS per week were calculated by summing all METS per week of each activity.

  • Dietary fiber was calculated using AOAC method.