Table 1.
Crude Hazard Ratios of Characteristics of Women by Self-Reported Abnormal Pap Test Status (n=956)
| |
Self-reported an abnormal Pap test |
|
|
|
|---|---|---|---|---|
| Characteristic | Yes n (%) | No n (%) | HRa | 95% CI |
| Age at interview, years | ||||
| 24–34 | 80 (35.9) | 177 (24.1) | 1.00 | – |
| 35–39 | 48 (21.5) | 99 (13.5) | 0.76 | 0.48-1.22 |
| 40–49 | 48 (21.5) | 148 (20.2) | 0.29 | 0.14-0.60 |
| ≥50 | 47 (21.1) | 309 (42.2) | 0.11 | 0.04-0.33 |
| Body mass index at enrollment, kg/m2 | ||||
| <25 | 98 (44.1) | 304 (41.8) | 1.00 | – |
| 25–29.9 | 25 (11.3) | 132 (18.2) | 0.73 | 0.47-1.15 |
| ≥30 | 6 (2.7) | 83 (11.4) | 0.31 | 0.14-0.72 |
| Missingb | 93 (41.9) | 208 (28.6) | 1.17 | 0.61-2.25 |
| Education level at interview | ||||
| ≤High school | 96 (43.1) | 352 (48.0) | 1.00 | – |
| Some college or higher | 127 (56.9) | 381 (52.0) | 0.96 | 0.73-1.26 |
| Household income/year at interview | ||||
| <$35, 000 | 82 (39.8) | 309 (46.0) | 1.00 | – |
| ≥$35, 000 | 124 (60.2) | 363 (54.0) | 0.95 | 0.71-1.26 |
| Health insurance status at interview | ||||
| No | 13 (5.8) | 56 (7.6) | 1.00 | – |
| Yes | 210 (94.2) | 676 (92.4) | 1.37 | 0.78-2.40 |
| History of DES exposure in uteroc | ||||
| No | 131 (68.2) | 355 (71.1) | 1.00 | – |
| Yes | 6 (3.1) | 5 (1.0) | 1.81 | 0.79-4.12 |
| Don't know | 55 (28.7) | 139 (27.9) | 1.05 | 0.76-1.44 |
| Lifetime duration of oral contraceptive use, years | ||||
| Never | 35 (15.7) | 222 (30.3) | 1.00 | – |
| 1–5 | 95 (42.6) | 317 (43.3) | 1.20 | 0.77-1.85 |
| 6–9 | 36 (16.1) | 94 (12.8) | 1.43 | 0.86-2.37 |
| ≥10 | 57 (25.6) | 100 (13.6) | 1.92 | 1.21-3.06 |
| History of cervical cancer | ||||
| No | 206 (92.4) | 733 (100.0) | 1.00 | – |
| Yes | 17 (7.6) | 0 (0.0) | 7.15 | 4.29-11.92 |
| Parityd | ||||
| No live births | 71 (31.8) | 101 (13.8) | 1.00 | – |
| 1–2 live births | 80 (35.9) | 257 (35.0) | 1.00 | 0.70-1.44 |
| ≥3 live births | 72 (32.3) | 375 (51.2) | 0.89 | 0.58-1.36 |
| Age at first live birth, yearsd | ||||
| No live births | 71 (31.8) | 101 (13.8) | 0.87 | 0.55-1.38 |
| <20 | 41 (18.4) | 152 (20.7) | 0.80 | 0.51-1.26 |
| 20–24 | 73 (32.7) | 316 (43.1) | 0.82 | 0.55-1.21 |
| ≥25 | 38 (17.1) | 164 (22.4) | 1.00 | – |
| History of smoking regularlyd | ||||
| Never | 138 (61.9) | 529 (72.2) | 1.00 | – |
| Former | 39 (17.5) | 108 (14.7) | 1.37 | 0.86-2.19 |
| Current | 46 (20.6) | 96 (13.1) | 1.61 | 1.19-2.17 |
| History of pelvic inflammatory diseased | ||||
| No | 214 (97.3) | 712 (97.3) | 1.00 | – |
| Yes | 6 (2.7) | 20 (2.7) | 1.12 | 0.50-2.54 |
| Breastfeeding duration, monthsd,e | ||||
| No breastfeeding | 159 (71.3) | 510 (69.6) | 1.00 | – |
| <12 | 49 (22.0) | 137 (18.7) | 1.17 | 0.82-1.65 |
| ≥12 | 15 (6.7) | 86 (11.7) | 0.85 | 0.49-1.49 |
Models stratified by birth cohort (<1940, 1940–1949, 1950–1959, 1960–1973).
Body mass index at enrollment missing if <16 years at enrollment.
Diethylstilbestrol (DES) exposure in utero not asked if participant was born before 1940 or after 1971.
Treated as time-dependent covariates in the extended Cox models; frequencies and proportions are based on status at the event (abnormal Pap test date) or at right censoring (interview date) (for parity, age at first live birth, history of breastfeeding, smoking, or pelvic inflammatory disease).
Breastfeeding duration between the initial PBB measurement up to the event (abnormal Pap test date) or right censoring (interview date).
CI, confidence interval; HR, hazard ratio.