Table 2.
Rate ratios of potential risk factors for self-reported gastric ulcers,Cooper Institute for Aerobics Research, Dallas, Texas, 1970-1990
| Men (n = 8,529) | Women (n = 2,884) | |||||
|---|---|---|---|---|---|---|
| Risk factor | Cases, No. | Subjects, No. | RR (95% CI) | Cases, No. | Subjects, No. | RR (95% CI) |
| Physical activity | ||||||
| Active | 19 | 2,059 | 0.51 (0.30-0.87) | 6 | 563 | 0.55 (0.22-1.37) |
| Moderately active | 47 | 3,686 | 0.71 (0.48-1.05) | 18 | 1,395 | 0.66 (0.35-1.27) |
| Referent | 50 | 2,784 | 1.00 | 18 | 926 | 1.00 |
|
|
Trend test: χ2 = 6.97, P = 0.01
|
Trend test: χ2 = 2.18, P = 0.14
|
||||
| Psychologicaltension* | ||||||
| High | 36 | 1,905 | 1.83 (1.22-2.75) | 16 | 635 | 2.67 (1.39-5.11) |
| Low | 63 | 6,112 | 1.00 | 20 | 2,116 | 1.00 |
| Smoking | ||||||
| Yes | 56 | 3,362 | 1.43 (1.01-2.06) | 18 | 1,043 | 1.32 (0.72-2.43) |
| No | 60 | 5,167 | 1.00 | 24 | 1,841 | 1.00 |
| Ethanol consumption | ||||||
| Heavy | 32 | 2,059 | 0.86 (0.55-1.34) | 6 | 325 | 1.26 (0.50-3.19) |
| Moderate | 13 | 1,507 | 0.48 (0.26-0.88) | 6 | 369 | 1.11 (0.44-2.82) |
| Light | 25 | 2,421 | 0.57 (0.35-0.93) | 14 | 1,098 | 0.87 (0.43-1.77) |
| None | 46 | 2,542 | 1.00 | 16 | 1,092 | 1.00 |
|
|
Trend test: χ2 = 0.80, P = 0.37
|
Trend test: χ2 = 0.24, P = 0.63
|
||||
| Age | ||||||
| >60 | 7 | 537 | 1.21 (0.54-2.72) | 1 | 179 | 0.41 (0.05-3.06) |
| 40.1 to 60 | 76 | 4,927 | 1.43 (0.95-2.15) | 25 | 1,535 | 1.15 (0.64-2.22) |
| 20 to 40 | 33 | 3,065 | 1.00 | 16 | 1,170 | 1.00 |
|
|
Trend test: χ2 = 1.84, P = 0.18
|
Trend test: χ2 = 0.17, P = 0.68
|
||||
| Body mass index | ||||||
| Higher 25% | 30 | 1,923 | 1.18 (0.76-1.82) | 4 | 618 | 0.38 (0.13-1.08) |
| Reference | 62 | 4,684 | 1.00 | 28 | 1,650 | 1.00 |
| Lower 25% | 24 | 1,922 | 0.94 (0.59-1.51) | 10 | 616 | 0.96 (0.47-1.96) |
| RR = risk ratio; CI = confidence interval | ||||||
*
The number of subjects in this category differs because only a subset of respondents was asked about psychological tension.