From: Factors associated with crack-cocaine early initiation: a Brazilian multicenter study
Between 15 and 17, how easily did you get: | Very easy | Easy | Hard | Very hard | P-valuea | Adjusted p-valueb |
Cigarettes (tobacco) (n = 564) | 557 (98.7) | 7 (1.3) | ||
Average age (SD, CI 95%) | 21.5 (6.89, 20.9–22.0) | 24.0 (11.61, 11.8–36.1) | 0.382 | 0.128 |
Alcohol drinks (n = 564) | 547 (97) | 17 (3) | ||
Average age (SD, CI 95%) | 21.4 (6.82, 20.8–22.0) | 25.5 (9.80, 20.3–30.7) | 0.020 | 0.441 |
Marijuana (n = 561) | 501 (89.3) | 60 (10.7) | ||
Average age (SD, CI 95%) | 20.9 (6.62, 20.3–21.5) | 26.8 (7.52, 24.8–28.7) | < 0.001 | 0.001 |
Cocaine (“snorted”) (n = 560) | 388 (69.3) | 172 (30.7) | ||
Average age (SD, CI 95%) | 20.1 (6.24, 19.4–20.7) | 24.9 (7.36, 23.8–26.0) | < 0.001 | 0.816 |
Crack cocaine (n = 559) | 221 (39.5) | 338 (60.5) | ||
Average age (SD, CI 95%) | 17.1 (4.21, 16.5–17.6) | 24.5 (6.87, 23.7–25.2) | < 0.001 | < 0.001 |
During childhood and adolescence, did your parents or caregivers find normal an adolescent: | Yes | Partially | No | P-valuea | Adjusted p-valueb |
To smoke cigarettes (tobacco)? (n = 519) | 131 (25.2) | 388 (74.8) | ||
Average age (SD, CI 95%) | 20.9 (7.17, 19.7–22.1) | 22.0 (6.81, 21.3–22.7) | 0.109 | 0.192 |
To drink alcoholic beverages? (n = 520) | 154 (29.5) | 366 (70.5) | ||
Average age (SD, CI 95%) | 21.4 (6.72, 20.3–22.4) | 21.9 (6.96, 22.1–22.6) | 0.468 | 0.866 |
To get drunk? (n = 520) | 70 (13.4) | 450 (86.6) | ||
Average age (SD, CI 95%) | 21.2 (6.95, 19.6–22.9) | 21.8 (6.90, 21.2–22.5) | 0.047 | 0.949 |
To smoke marijuana? (n = 521) | 18 (3.4) | 503 (96.6) | ||
Average age (SD, CI 95%) | 20.7 (7.34, 17.0–24.3) | 21.8 (6.89, 21.2–22.4) | 0.498 | 0.783 |
During childhood / adolescence, how often did your parents / caregivers: | Almost everyday | Weekly | Monthly | Never | P-valuea | Adjusted p-valueb |
Smoke cigarettes (tobacco) (n = 519) | 380 (73.2) | 139 (26.8) | ||
Average age (SD, CI 95%) | 22.0 (7.17, 21.3–22.8) | 20.8 (6.05, 19.8–21.9) | 0.081 | 0.063 |
Drink alcoholic beverages (n = 521) | 299 (57.3) | 222 (42.7) | ||
Average age (SD, CI 95%) | 21.7 (6.64, 20.9–22.4) | 21.8 (7.24, 20.9–22.8) | 0.799 | 0.366 |
Get drunk (n = 519) | 187 (36.1) | 332 (63.9) | ||
Average age (SD, CI 95%) | 20.9 (6.19, 20.0–21.8) | 22.2 (7.22, 21.4–23.0) | 0.047 | 0.034 |
Smoke marijuana (n = 516) | 48 (9.2) | 468 (90.8) | ||
Average age (SD, CI 95%) | 20.5 (6.52, 18.6–22.4) | 21.9 (6.94, 21.2–22.5) | 0.198 | 0.337 |
Snorted cocaine (n = 515) | 28 (5.4) | 487 (94.6) | ||
Average age (SD, CI 95%) | 19.8 (4.99, 17.8–21.7) | 21.9 (7.01, 21.2–22.5) | 0.122 | 0.471 |
Between 15 and 17, how many friends of yours used to: | Nobody | A few | Some | Majority | Everybody | P-valuea | Adjusted p-valueb |
Smoke cigarettes (tobacco) (n = 557) | 216 (38.7) | 341 (61.3) | 0.001 | 0.019 |
Average age (SD, CI 95%) | 22.6 (6.97, 21.7–23.6) | 20.7 (6.77, 20.0–21.5) | ||
Drink alcohol (n = 557) | 201 (37) | 356 (63) | < 0.001 | 0.027 |
Average age (SD, CI 95%) | 23.3 (7.57, 22.3–24.4) | 20.4 (6.27, 19.8–21.1) | ||
Get drunk (n = 557) | 264 (47) | 295 (53) | < 0.001 | 0.837 |
Average age (SD, CI 95%) | 22.9 (7.27, 22.0–23.8) | 20.2 (6.29, 19.4–20.9) | ||
Have problems related to alcohol use (n = 553) | 324 (58.5) | 229 (41.5) | < 0.001 | 0.928 |
Average age (SD, CI 95%) | 22.5 (7.32, 21.7–23.4) | 20.0 (5.99, 19.3–20.8) | ||
Smoke marijuana (n = 556) | 283 (50.9) | 273 (49.1) | < 0.001 | 0.109 |
Average age (SD, CI 95%) | 23.0 (7.07, 22.2–23.8) | 19.9 (6.36, 19.1–20.6) | ||
Smoke crack cocaine (n = 555) | 498 (89.7) | 57 (10.3) | < 0.001 | < 0.001 |
Average age (SD, CI 95%) | 22.2 (6.84, 21.6–22.8) | 15.4 (3.89, 14.4–16.4) |