Table 1.
Sociodemographic details of cases and controls
| Characteristics | Total n=399 | Cases n=232 | Controls n=167 |
|---|---|---|---|
| Age (in years)a | 38.75±11.44 | 37.74±11.15 | 40.14±11.72 |
| BMIa | 24.94±3.78 | 25.04±3.78 | 24.81±3.79 |
| Marital status - marriedb | 316 (79.2) | 181 (78) | 135 (80.8) |
| Gender - maleb | 288 (72.2) | 165 (71.1) | 123 (73.7) |
| Education - literateb | 345 (86.5) | 198 (85.3) | 147 (88.0) |
| ASA class of patients - 1b | 291 (72.9) | 177 (76.3) | 114 (68.3) |
| Previous surgical experienceb | 237 (59.4) | 130 (56) | 107 (64.1) |
| Without health insuranceb | 388 (97.2) | 229 (98.7) | 159 (95.2) |
| Type of house - thatchedb | 313 (78.4) | 187 (80.6) | 126 (75.4) |
| Monthly incomec | 5000-10000 | 5000-10000 | 8000-15000 |
| Residence (within Tamil Nadu)b | 139 (34.8) | 81 (34.9) | 58 (34.7) |
| Residence (outside Tamil Nadu but within India)b | 231 (57.9) | 131 (56.5) | 100 (59.9) |
| Residence (outside India)b | 29 (7.3) | 20 (8.6) | 9 (5.4) |
BMI – Body mass index; ASA – American Society of Anaesthesiologists. aMean±standard deviation; bFrequency (%); cMedian, interquartile range