Table 2.

Selected baseline characteristics of the AARP Diet and Health Study by cohort and lung cancer cases of nut consumption

Quintile of total nut consumption (frequency/d) in cohorta
12345
CharacteristicsCohort (n = 495,785)Cases (n = 18,533)(n = 51,217)(n = 122,447)(n = 147,636)(n = 87,389)(n = 87,096)
Sex, n (%)
 Male295,953 (59.69)11,717 (63.22)28,459 (55.57)66,745 (54.51)87,902 (59.54)55,280 (63.26)57,567 (66.10)
Age,b y62.02 (5.37)63.58 (4.86)62.72 (5.30)61.90 (5.40)61.74 (5.38)61.89 (5.36)62.37 (5.31)
BMI,b kg/m227.11 (5.08)26.57 (4.87)27.18 (5.64)27.37 (5.33)27.30 (5.03)27.10 (4.81)26.41 (4.64)
Education, n (%)
 <High school27,854 (5.84)1,830 (9.87)5,446 (10.63)8,543 (6.98)8,098 (5.49)4,022 (4.60)3,575 (4.10)
 Completed high school145,770 (29.40)6,253 (33.74)18,175 (35.49)40,701 (33.24)43,196 (29.25)23,156 (26.50)20,542 (23.58)
 Post-high school training110,262 (23.10)4,663 (25.16)10,897 (21.28)29,370 (23.99)34,658 (23.48)20,296 (23.22)19,704 (22.62)
 Completed college185,751 (38.92)5,140 (27.73)14,106 (27.54)40,098 (32.75)57,775 (39.13)37,726 (43.17)41,186 (47.29)
Smoking status, n (%)
 Neverc173,887 (35.07)1,196 (6.45)16,489 (32.19)41,765 (34.11)52,250 (35.39)31,112 (35.60)32,271 (37.05)
 Former243,703 (49.15)9,607 (51.84)24,228 (47.30)60,458 (49.37)72,592 (49.17)43,404 (49.67)43,021 (49.39)
 Current59,353 (11.97)7,043 (38.00)7,603 (14.84)15,801 (12.90)17,391 (11.78)9,712 (11.11)8,846 (10.16)
Cigarettes smoked per day, n (%)d
 1–1075,002 (15.72)2,081 (11.23)7,659 (14.95)19,164 (15.65)22,928 (15.53)13,569 (15.53)13,763 (15.80)
 11–2093,390 (19.57)5,378 (29.02)10,151 (19.82)25,265 (20.63)29,386 (19.90)17,114 (19.58)16,852 (19.35)
 21–4098,133 (19.79)6,972 (37.62)10,539 (20.58)24,579 (20.07)29,119 (19.72)17,418 (19.93)16,478 (18.92)
 >4129,072 (5.86)2,219 (11.97)3,482 (6.79)7,251 (5.92)8,550 (5.79)5,015 (5.74)4,774 (5.48)
Years since quitting smoking, n (%)e
 ≥10180,197 (36.35)5,117 (27.61)16,342 (31.91)43,254 (35.32)54,231 (36.73)32,907 (37.66)33,463 (38.42)
 5–934,584 (6.98)2,139 (11.54)4,019 (7.85)9,465 (7.73)10,089 (6.83)5,725 (6.55)5,286 (6.07)
 1–420,074 (4.05)1,576 (8.50)2,707 (5.29)5,478 (4.47)5,697 (3.86)3,258 (3.73)2,934 (3.37)
 0–18,848 (1.78)775 (4.18)1,160 (2.26)2,261 (1.85)2,575 (1.74)1,514 (1.73)1,338 (1.54)
Lifetime alcohol,c g/wk12.67 (34.14)18.64 (47.16)10.06 (34.36)10.79 (32.26)12.34 (33.26)13.89 (34.15)16.19 (37.53)
Energy intake,b cal/wk1,851.81 (840.20)1,931.67 (916.68)1,719.07 (865.53)1,642.54 (754.49)1,792.58 (786.51)1,995.83 (832.03)2,179.96 (910.00)
Total red meat,b g/wk66.28 (57.75)75.57 (62.90)56.95 (58.50)56.61 (51.37)66.16 (54.87)76.16 (60.30)75.64 (64.38)
Total processed meat,b g/wk20.00 (23.00)23.14 (24.94)19.20 (25.57)18.06 (22.31)19.59 (22.13)21.89 (22.63)22.03 (23.88)
Total fruits,b g/wk371.26 (343.66)311.24 (308.95)372.49 (384.26)345.66 (333.00)356.55 (328.32)383.39 (334.45)419.31 (361.77)
Total vegetables,b g/wk300.49 (209.25)288.02 (204.05)293.01 (243.81)269.93 (192.24)288.67 (195.17)320.04 (201.94)248.29 (229.34)
Total nut consumption,b g/wk20.14 (59.44)19.64 (61.59)0.00 (0.00)1.75 (1.82)7.08 (6.60)17.80 (16.15)82.34 (122.05)
  • NOTE: Some percentages do not sum to 100 due to missing data.

  • aNut consumption in sex-specific quintiles based on distribution of controls: quintile 1 (nonconsumers), quintile 2 (1–6 times/y), quintile 3 (7–11 times/y), quintile 4 (once a month up to 2–3 times a month), and quintile 5 (once a week up to 6 times a week, and once a day up to 2 or more times a day).

  • bValues are shown in mean (SD).

  • cNever smokers of any tobacco products (cigarettes, pipes, cigars).

  • dCurrent smokers and former smokers.

  • eFormer smokers.