Table II.
Descriptive Statistics for the Physical Activity Trajectories
| Total (n = 1429) | CPA (n = 77) | SHPA (n = 299) | DPA (n = 170) | SRPA (n = 213) | SLPA (n = 670) | |
|---|---|---|---|---|---|---|
| Female | 50 (716) | 39 (30) | 40 (119) | 33 (56) | 46 (98) | 62 (413) |
| White | 73 (1038) | 74 (57) | 78 (232) | 82 (139) | 72 (152) | 68 (458) |
| Both parents have a high school education or less | 17 (236) | 22 (16) | 18 (52) | 15 (26) | 14 (30) | 17 (112) |
| Physical activity, Wave 1 (Mean, SD) | 8.72 (8.42) | 6.47 (5.78) | 15.52 (7.67) | 21.48 (7.17) | 6.84 (3.84) | 3.30 (3.21) |
| Physical activity, Wave 4 (Mean, SD) | 7.81 (7.48) | 20.70 (7.40) | 13.92 (7.10) | 7.74 (6.35) | 8.38 (5.29) | 3.12 (3.54) |
| Physical activity, Wave 8 (Mean, SD) | 7.03 (6.71) | 8.07 (6.25) | 11.24 (7.67) | 12.02 (9.01) | 7.07 (2.97) | 2.73 (1.95) |
| Smoked in the past 30 days, Wave 1 | 3 (44) | 4 (3) | 2 (5) | 5 (9) | 2 (5) | 3 (22) |
| Smoked in the past 30 days, Wave 4 | 2 (27) | 2 (1) | 0.42 (1) | 2 (3) | 3 (6) | 3 (16) |
| Smoked in the past 30 days, Wave 8 | 3 (34) | 3 (2) | 1 (2) | 7 (10) | 4 (6) | 3 (14) |
| Smokes weekly, Wave 1 | 7 (97) | 5 (4) | 1 (3) | 11 (18) | 7 (14) | 9 (58) |
| Smokes weekly, Wave 4 | 9 (99) | 8 (5) | 2 (6) | 16 (21) | 10 (18) | 10 (49) |
| Smokes weekly, Wave 8 | 12 (129) | 10 (7) | 2 (4) | 20 (28) | 11 (19) | 14 (71) |
| Used alternative tobacco in the past month, Wave 1 | 5 (73) | 5 (4) | 3 (8) | 12 (20) | 3 (6) | 5 (35) |
| Used alternative tobacco in the past month, Wave 4 | 9 (103) | 9 (6) | 8 (20) | 18 (24) | 10 (18) | 7 (35) |
| Used alternative tobacco in the past month, Wave 8 | 12 (131) | 7 (5) | 10 (25) | 32 (45) | 15 (26) | 6 (30) |
Note. CPA = Curvilinear physical activity; SHPA = stable higher physical activity; DPA = decreased physical activity; SRPA = stable regular physical activity; SLAP = stable low physical activity. Values are expressed as % (n) unless otherwise specified.