Table 1 Demographic characteristics of GERD and non-GERD groups after propensity score matching n(%)
Variables | GERD (n = 1184) | Non-GERD (n = 1184) | Total (N = 2368) | t/χ2 | p-value |
|---|---|---|---|---|---|
Age (years) | |||||
≤ 29 | 433 (36.6) | 426 (36.0) | 859 (36.3) | .11 | .949 |
30–39 | 505 (42.6) | 512 (43.2) | 1017 (42.9) | ||
≥ 40 | 246 (20.8) | 246 (20.8) | 492 (20.8) | ||
Educational status | |||||
3-year college | 533 (45.0) | 506 (42.7) | 1039 (43.9) | 1.28 | .528 |
4-year college | 538 (45.5) | 558 (47.1) | 1096 (46.3) | ||
Master’s degree or higher | 113 (9.5) | 120 (10.2) | 233 (9.8) | ||
Marital status | |||||
Single | 732 (61.8) | 728 (61.5) | 1460 (61.7) | .03 | .986 |
Married | 443 (37.4) | 447 (37.7) | 890 (37.5) | ||
Divorced or widowed | 9 (.8) | 9 (.8) | 18 (.8) | ||
Annual income (USD) | |||||
≤ 20,000 | 35 (3.0) | 24 (2.0) | 59 (2.5) | 3.29 | .511 |
20,000–29,999 | 445 (37.6) | 440 (37.2) | 885 (37.3) | ||
30,000–39,999 | 439 (37.1) | 436 (36.8) | 875 (37.0) | ||
40,000–49,999 | 158 (13.3) | 178 (15.0) | 336 (14.2) | ||
≥ 50,000 | 107 (9.0) | 106 (9.0) | 213 (9.0) | ||
Work schedule | |||||
Non-rotating (no night shift) | 368 (31.1) | 350 (29.6) | 718 (30.3) | .65 | .421 |
Rotating with night shift | 816 (68.9) | 834 (70.4) | 1650 (69.7) | ||