Table 3.
Baseline characteristics of osteosarcoma patients by marital status in 1: 1 matched group (n, %).
| Characteristics | Total | Married | Unmarried | p-Valuea |
|---|---|---|---|---|
| Marital status | 1274 (100.00) | 637 (50.00) | 637 (50.00) | |
| Age | 1 | |||
| <50 | 1122 (88.07) | 561 (88.07) | 561 (88.07) | |
| ≥50 | 152 (11.93) | 76 (11.93) | 76 (11.93) | |
| Sex | 1 | |||
| Male | 692 (54.32) | 346 (54.32) | 346 (54.32) | |
| Female | 582 (45.68) | 291 (45.68) | 291 (45.68) | |
| Race | 1 | |||
| White | 1032 (81.00) | 516 (81.00) | 516 (81.00) | |
| Black | 140 (10.99) | 70 (10.99) | 70 (10.99) | |
| Othersb | 102 (8.01) | 51 (8.01) | 51 (8.01) | |
| Diagnosis year | 0.998 | |||
| 1973–1987 | 182 (14.29) | 91 (14.29) | 91 (14.29) | |
| 1988–2001 | 429 (33.67) | 215 (33.75) | 214 (33.59) | |
| 2002–2015 | 663 (52.04) | 331 (51.96) | 332 (52.12) | |
| Insurance status | 1 | |||
| Insured | 391 (30.69) | 195 (30.61) | 196 (30.77) | |
| Uninsured | 7 (0.55) | 4 (0.63) | 3 (0.47) | |
| Unknown | 876 (68.76) | 438 (68.76) | 438 (68.76) | |
| Grade | 0.623 | |||
| Well | 90 (7.06) | 48 (7.54) | 42 (6.59) | |
| Moderately | 106 (8.32) | 56 (8.79) | 50 (7.85) | |
| Poorly | 233 (18.29) | 107 (16.80) | 126 (19.78) | |
| Undifferentiated | 440 (34.54) | 218 (34.22) | 222 (34.85) | |
| Unknown | 405 (31.79) | 208 (32.65) | 197 (30.93) | |
| TNM stage | 0.999 | |||
| I | 93 (7.30) | 46 (7.22) | 47 (7.38) | |
| II | 274 (21.51) | 137 (21.51) | 137 (21.51) | |
| III | 6 (0.47) | 3 (0.47) | 3 (0.47) | |
| IV | 76 (5.97) | 39 (6.12) | 37 (5.81) | |
| Unknown | 825 (64.76) | 412 (64.68) | 413 (64.84) | |
| SEER stage | 0.915 | |||
| Localized | 67 (5.26) | 33 (5.18) | 34 (5.34) | |
| Regional | 59 (4.63) | 27 (4.24) | 32 (5.02) | |
| Distant | 29 (2.28) | 14 (2.20) | 15 (2.35) | |
| Unknown | 1119 (87.83) | 563 (88.38) | 556 (87.28) | |
| Surgery | 1 | |||
| No | 182 (14.29) | 91 (14.29) | 91 (14.29) | |
| Yes | 1085 (85.16) | 543 (85.24) | 542 (85.09) | |
| Unknown | 7 (0.55) | 3 (0.47) | 4 (0.63) | |
| Chemotherapy | 0.951 | |||
| No | 384 (30.14) | 191 (29.98) | 193 (30.30) | |
| Yes | 890 (69.86) | 446 (70.02) | 444 (69.70) | |
| Radiotherapy | 1 | |||
| No | 1192 (93.56) | 595 (93.41) | 597 (93.72) | |
| Yes | 82 (6.44) | 42 (6.59) | 40 (6.28) |
a
The p-values compared married, divorced/separated, widowed, and never married calculated with the use of a chi-square test;
b
Other race (American Indian/AK Native, Asian/Pacific Islander).