Table 1 Analysis of differences before and after propensity score matching
Characteristics | Group | Before matching (5,482) | After matching (2,070) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
HRT- (4,447) | HRT+ (1,035) | ×2 | HRT- (1,035) | HRT+ (1,035) | ×2 | ||||||
Education | Elementary and below | 2,785 | (62.63) | 460 | (44.44) | < 0.001*** | 460 | (44.44) | 460 | (44.44) | 1.000 |
Middle | 693 | (15.58) | 218 | (21.06) | 218 | (21.06) | 218 | (21.06) | |||
High and above | 969 | (21.79) | 357 | (34.49) | 357 | (34.49) | 357 | (34.49) | |||
Family incomea | Low | 1,543 | (34.70) | 214 | (20.68) | < 0.001*** | 214 | (20.68) | 214 | (20.68) | 1.000 |
Middle low | 1,228 | (27.61) | 289 | (27.92) | 289 | (27.92) | 289 | (27.92) | |||
Middle upper | 867 | (19.50) | 251 | (24.25) | 251 | (24.25) | 251 | (24.25) | |||
Upper | 809 | (18.19) | 281 | (27.15) | 281 | (27.15) | 281 | (27.15) | |||
Age of menopause(y) | < 45 | 637 | (14.32) | 163 | (15.75) | 0.242 | 163 | (15.75) | 163 | (15.75) | 1.000 |
≥45 | 3,810 | (85.68) | 872 | (84.25) | 872 | (84.25) | 872 | (84.25) | |||
Periodontal disease | No | 2,657 | (59.75) | 686 | (66.28) | < 0.001*** | 629 | (60.77) | 686 | (66.28) | 0.009** |
Yes | 1,790 | (40.25) | 349 | (33.72) | 406 | (39.23) | 349 | (33.72) | |||
Age (y) | 45–54 | 990 | (22.26) | 265 | (25.60) | < 0.001*** | 331 | (31.98) | 265 | (25.60) | < 0.001*** |
55–64 | 1,726 | (38.81) | 516 | (49.86) | 394 | (38.07) | 516 | (49.86) | |||
65–74 | 1,731 | (38.93) | 254 | (24.54) | 310 | (29.95) | 254 | (24.54) | |||
Body mass indexb | Normal | 2,662 | (59.86) | 655 | (63.29) | 0.042* | 654 | (63.19) | 655 | (63.29) | 0.964 |
Obese | 1,785 | (40.14) | 380 | (36.71) | 381 | (36.81) | 380 | (36.71) | |||
Alcohol | No | 1,459 | (32.81) | 266 | (25.70) | < 0.001*** | 321 | (31.01) | 266 | (25.70) | 0.019* |
Past | 1,868 | (42.01) | 449 | (43.38) | 432 | (41.74) | 449 | (43.38) | |||
Drinking | 1,120 | (25.19) | 320 | (30.92) | 282 | (27.25) | 320 | (30.92) | |||
Smoking | No | 4,127 | (92.80) | 963 | (93.04) | 0.788 | 961 | (92.85) | 963 | (93.04) | 0.864 |
Yes | 320 | (07.20) | 72 | (06.96) | 74 | (07.15) | 72 | (06.96) | |||
Dental visit < 1 years | No | 3,531 | (79.40) | 741 | (71.59) | < 0.001*** | 760 | (73.43) | 741 | (71.59) | 0.351 |
Yes | 916 | (20.60) | 294 | (28.41) | 275 | (26.57) | 294 | (28.41) | |||
Use of oral care products | No | 3,337 | (75.04) | 627 | (60.58) | < 0.001*** | 685 | (66.18) | 627 | (60.58) | 0.008** |
Yes | 1,110 | (24.96) | 408 | (39.42) | 350 | (33.82) | 408 | (39.42) | |||
Frequency of tooth brushing per day | < 3 | 2,852 | (64.13) | 608 | (58.74) | 0.001** | 581 | (56.14) | 608 | (58.74) | 0.231 |
≥3 | 1,595 | (35.87) | 427 | (41.26) | 454 | (43.86) | 427 | (41.26) | |||