Table 4 The NHEFS data analysis: baseline characteristics between non-quitters and quitters
From: Estimation of average treatment effect based on a multi-index propensity score
Characteristic | Non-quitters | Quitters | P-value |
|---|---|---|---|
N = 1128, 74.85% | N = 379, 25.15% | ||
| Â | Mean (STD) | Mean (STD) | Â |
Age (years) | 42.81 (11.83) | 45.92 (12.36) |  < 0.001 |
Weight (kilograms) | 70.33 (15.18) | 72.09 (15.46) | 0.051 |
Smoking intensity (number/day) | 21.27 (11.48) | 18.61 (12.47) |  < 0.001 |
Smoking years | 24.13 (11.73) | 25.88 (12.86) | 0.014 |
Family income level | 7.94 (2.70) | 8.15 (2.48) | 0.173 |
| Â | Number (%) | Number (%) | Â |
Female | 598 (53.0) | 176 (46.4) | 0.031 |
Black or other | 161 (14.3) | 34 (9.0) | 0.01 |
Active life level | Â | Â | 0.268 |
 very active | 514 (45.6) | 156 (41.2) |  |
 moderately active | 515 (45.7) | 183 (48.3) |  |
 inactive | 99 (8.8) | 40 (10.6) |  |
Education level | Â | Â | 0.01 |
 8th grade or less | 203 (18.0) | 76 (20.1) |  |
 high school dropout | 252 (22.3) | 72 (19.0) |  |
 high school | 471 (41.8) | 144 (38.0) |  |
 college dropout | 91 (8.1) | 26 (6.9) |  |
 college or more | 111 (9.8) | 61 (16.1) |  |
Exercise situation | Â | Â | 0.121 |
 much exercise | 233 (20.7) | 60 (15.8) |  |
 moderate exercise | 473 (41.9) | 168 (44.3) |  |
 little or no exercise | 422 (37.4) | 151 (39.8) |  |
Ever use of weight loss medication 31 (2.7) | 7 (1.8) | 0.436 | |