Table 4.
Results of linear regression analysis
| Variables | Regression coefficient | Standard error | t | P | 95%CI | |
|---|---|---|---|---|---|---|
| Lower limit | Upper limit | |||||
| Gender (control = female) | ||||||
| Male | 0.124* | 0.065 | -1.905 | 0.057 | -0.004 | 0.252 |
| Age group (control = youth) | ||||||
| Middle age | 0.128 | 0.086 | -1.478 | 0.139 | -0.042 | 0.297 |
| Young elderly | 0.572*** | 0.101 | -5.657 | < 0.001 | 0.373 | 0.770 |
| Elderly | 1.156*** | 0.138 | -8.346 | < 0.001 | 0.884 | 1.427 |
| Long-lived elderly | 3.138*** | 0.533 | -5.893 | < 0.001 | 2.094 | 4.182 |
| Education level (control = elementary school and below) | ||||||
| Junior high school | -0.038 | 0.081 | -0.472 | 0.637 | -0.196 | 0.120 |
| Secondary or high school | 0.115 | 0.129 | -0.890 | 0.373 | -0.139 | 0.369 |
| College | -0.102 | 0.156 | -0.655 | 0.512 | -0.407 | 0.203 |
| Bachelor’s degree and above | 0.176 | 0.189 | -0.928 | 0.353 | -0.195 | 0.547 |
| Marital status (control = never married) | ||||||
| Married | 0.047 | 0.151 | -0.314 | 0.753 | -0.248 | 0.343 |
| Source of admission (control = non-emergency sources) | ||||||
| Emergency sources | -0.103 | 0.134 | -0.772 | 0.440 | -0.366 | 0.159 |
| Mode of admission (control = walk) | ||||||
| Stretcher | 2.252*** | 0.193 | -11.689 | < 0.001 | 1.874 | 2.630 |
| Wheelchair | 1.727*** | 0.145 | -11.926 | < 0.001 | 1.443 | 2.011 |
| Purpose of visit (control = non-surgical) | ||||||
| Surgical | 0.294* | 0.155 | -1.9 | 0.057 | -0.009 | 0.597 |
| Occupation (control = farmer) | ||||||
| Self-employed | -0.108 | 0.118 | -0.914 | 0.361 | -0.339 | 0.124 |
| Retired (resigned) person | -0.305 | 0.192 | -1.586 | 0.113 | -0.682 | 0.072 |
| Worker | -0.323** | 0.162 | -1.996 | 0.046 | -0.640 | -0.006 |
| Other | -0.115 | 0.100 | -1.150 | 0.250 | -0.310 | 0.081 |
| Medical payment method (control = new rural cooperative medical insurance) | ||||||
| Basic medical insurance for urban residents | 0.070 | 0.080 | -0.873 | 0.383 | -0.087 | 0.227 |
| Basic medical insurance for urban workers | -0.012 | 0.125 | -0.096 | 0.924 | -0.257 | 0.233 |
| Fully self-paid | -0.085 | 0.176 | -0.484 | 0.628 | -0.430 | 0.260 |
| Other | 0.231 | 0.340 | -0.679 | 0.497 | -0.436 | 0.898 |
| Major diagnostic categories (control = diseases of the circulatory system) | ||||||
| Certain infectious and parasitic diseases | -0.010 | 0.274 | -0.036 | 0.971 | -0.547 | 0.527 |
| Neoplasms | 0.752*** | 0.13 | 5.785 | < 0.001 | 0.497 | 1.007 |
| Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism | 0.950*** | 0.357 | 2.663 | 0.008 | 0.250 | 1.649 |
| Endocrine, nutritional and metabolic diseases | -0.117 | 0.096 | -1.213 | 0.225 | -0.305 | 0.072 |
| Mental and behavioral disorders | 0.207 | 0.315 | 0.657 | 0.511 | -0.411 | 0.825 |
| Diseases of the nervous system | -0.042 | 0.139 | -0.303 | 0.762 | -0.314 | 0.230 |
| Diseases of the eye and adnexa | -0.259* | 0.143 | -1.813 | 0.070 | -0.538 | 0.021 |
| Diseases of the ear and mastoid process | -0.500*** | 0.114 | -4.376 | < 0.001 | -0.725 | -0.276 |
| Diseases of the respiratory system | 0.828*** | 0.209 | 3.955 | < 0.001 | 0.417 | 1.238 |
| Diseases of the digestive system | 0.570*** | 0.111 | 5.119 | < 0.001 | 0.352 | 0.788 |
| Diseases of the skin and subcutaneous tissue | 0.428** | 0.214 | 1.997 | 0.046 | 0.008 | 0.849 |
| Diseases of the musculoskeletal system and connective tissue | 0.936*** | 0.187 | 4.995 | < 0.001 | 0.569 | 1.304 |
| Diseases of the genitourinary system | 1.113*** | 0.164 | 6.801 | < 0.001 | 0.792 | 1.434 |
| Congenital malformations, deformations and chromosomal abnormalities | 0.719*** | 0.274 | 2.625 | 0.009 | 0.182 | 1.256 |
| Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified | 0.047 | 0.309 | 0.154 | 0.878 | -0.558 | 0.653 |
| Injury, poisoning and certain other consequences of external causes | 0.615*** | 0.176 | 3.492 | < 0.001 | 0.270 | 0.961 |
| Factors influencing health status and contact with health services | 0.837*** | 0.147 | 5.71 | < 0.001 | 0.550 | 1.125 |
| Intercepts | 0.070 | 0.194 | 0.36 | 0.719 | -0.310 | -0.450 |
***P < 0.01, **P < 0.05, *P < 0.1