Table 1.
Baseline characteristics of the study participants included in the analyses of the first objective (dataset 1) by body mass index categories and of the second objective (dataset 2)
| Dataset 1, N (%) | Dataset 2, N (%) | ||||
|---|---|---|---|---|---|
| Under and normal weight (BMI < 25) | Overweight (BMI ≥ 25 and < 30) | Obese (BMI ≥ 30) | BMI total | WC total | |
| Characteristic | 1,436,991 (39.3) | 1,326,642 (36.3) | 894,784 (24.4) | 3,658,417 (100) | 291,305 (100) |
| Follow-up (in years)a,b | 7.7 (4.4–10.6) | 8.5 (5.0–11.3) | 9.1 (5.6–11.8) | 8.3 (4.9–11.2) | 9.9 (6.9–11.9) |
| Visits to health centerb,c | 5 (3–9) | 7 (4–12) | 8 (5–14) | 6 (3–11) | 10 (6–16) |
| BMIb | 22.5 (20.8–23.8) | 27.3 (26.1–28.5) | 32.9 (31.2–35.6) | 26.3 (23.2–29.9) | 29.0 (25.9–32.5) |
| WCb | – | – | – | – | 100 (91–108) |
| Age (in years)b,d | 36 (27–50) | 51 (37–65) | 55 (42–66) | 46 (32–61) | 59 (46–71) |
| Sex | |||||
| Men | 527,253 (36.7) | 707,939 (53.4) | 394,948 (44.1) | 1,630,140 (44.6) | 137,298 (47.1) |
| Women | 909,738 (63.3) | 618,703 (46.6) | 499,836 (55.9) | 2,028,277 (55.4) | 154,007 (52.9) |
| MEDEA deprivation indexe | |||||
| Quintile 1 | 226,165 (15.7) | 180,162 (13.6) | 98,899 (11.0) | 505,226 (13.8) | 32,542 (11.2) |
| Quintile 2 | 208,133 (14.5) | 189,510 (14.3) | 119,236 (13.3) | 516,879 (14.2) | 39,826 (13.7) |
| Quintile 3 | 198,978 (13.9) | 192,240 (14.5) | 131,763 (14.7) | 522,981 (14.3) | 40,019 (13.7) |
| Quintile 4 | 193,565 (13.5) | 195,463 (14.7) | 142,024 (15.9) | 531,052 (14.5) | 41,767 (14.3) |
| Quintile 5 | 190,155 (13.2) | 185,886 (14.0) | 144,632 (16.2) | 520,673 (14.2) | 34,249 (11.8) |
| Rural | 263,435 (18.3) | 251,378 (18.9) | 169,075 (18.9) | 683,888 (18.7) | 73,535 (25.2) |
| Missing | 156,560 (10.9) | 132,003 (10.0) | 89,155 (10.0) | 377,718 (10.3) | 29,367 (10.1) |
| Nationality (geographic region) | |||||
| Spain | 1,216,424 (84.6) | 1,169,166 (88.1) | 804,483 (89.9) | 3,190,073 (87.2) | 271,950 (93,3) |
| Europe (non-Spanish) | 68,689 (4.8) | 36,592 (2.8) | 22,475 (2.5) | 127,756 (3.5) | 5560 (1.9) |
| Africa | 15,968 (1.1) | 13,208 (1.0) | 6379 (0.7) | 34,655 (1.0) | 1019 (0.4) |
| America | 75,117 (5.2) | 63,293 (4.8) | 37,867 (4.2) | 176,277 (4.8) | 7310 (2.5) |
| Asia | 61,693 (4.3) | 44,383 (3.3) | 23,580 (2.7) | 129,656 (3.5) | 5466 (1.9) |
| Smoking status | |||||
| Never | 674,872 (46.9) | 688,304 (51.9) | 487,643 (54.5) | 1,850,819 (50.6) | 174,775 (60.0) |
| Former | 113,105 (7.9) | 154,969 (11.7) | 106,333 (11.9) | 374,407 (10.2) | 33,958 (11.6) |
| Current | 438,103 (30.5) | 308,376 (23.2) | 177,332 (19.8) | 923,811 (25.3) | 58,468 (20.1) |
| Missing | 210,911 (14.7) | 174,993 (13.2) | 123,476 (13.8) | 509,380 (13.9) | 24,104 (8.3) |
| Alcohol intake | |||||
| None | 541,451 (37.7) | 464,399 (35.0) | 315,211 (35.2) | 1,321,061 (36.1) | 107,230 (36.8) |
| Low | 340,721 (23.7) | 325,238 (24.5) | 173,382 (19.4) | 839,341 (22.9) | 60,568 (20.8) |
| High | 25,114 (1.7) | 28,074 (2.1) | 19,043 (2.1) | 72,231 (2.0) | 7077 (2.4) |
| Missing | 529,705 (36.9) | 508,931 (38.4) | 387,148 (43.3) | 1,425,784 (39.0) | 116,430 (40.0) |
| Type 2 diabetes | 34,847 (2.4) | 109,302 (8.2) | 123,313 (13.8) | 267,426 (7.3) | 50,269 (17.3) |
| Cause of end of follow-up | |||||
| End of study | 1,170,596 (81.5) | 1,037,513 (78.2) | 683,190 (76.4) | 2,891,299 (79.0) | 207,329 (71.2) |
| Cancerf | 47,609 (3.3) | 87,344 (6.6) | 67,875 (7.6) | 202,828 (5.6) | 27,837 (9.5) |
| Death | 51,777 (3.6) | 82,920 (6.2) | 70,090 (7.8) | 204,787 (5.6) | 33,702 (11.6) |
| Transferred-out | 167,009 (11.6) | 118,865 (9.0) | 73,629 (8.2) | 359,503 (9.8) | 22,437 (7.7) |
BMI body mass index, MEDEA “Mortalidad en áreas pequeñas Españolas y Desigualdades Socioeconómicas y Ambientales”, WC waist circumference
aParticipants were followed from the study index date until cancer diagnosis, death, transferal out of the SIDIAP, or until the end of the study period (December 31, 2018)
bMedian (interquartile range)
cVisits to general practitioners and nurses during the year of BMI assessment
dAt baseline
eQuintile 1 represents the least deprived and quintile 5 represents the most deprived. Rural was included as a category since the index cannot be calculated for people living in rural areas
fAny, excl. non-melanoma skin cancer