California state inpatient database characteristics 2005–2011
| Meth discharges (n=182 766) | Nonmeth discharges (n=20 942 483) | SMD | |
| Age group | 1.229 | ||
| 18–25 years | 32 151 (18%) | 1 862 559 (8%) | |
| 26–35 years | 48 357 (26%) | 3 008 855 (14%) | |
| 36–45 years | 51 283 (28%) | 2 329 449 (11%) | |
| 46–55 years | 38 918 (21%) | 2 790 528 (13%) | |
| 56–65 years | 10 540 (6%) | 2 991 208 (14%) | |
| 66–75 years | 1517 (1%) | 7 959 884 (36%) | |
| Age years median (IQR) | 37 (28, 47) | 57 (37, 75) | 1.065 |
| Sex | 0.414 | ||
| Male | 106 665 (58%) | 7 982 930 (36%) | |
| Female | 76 101 (42%) | 12 959 553 (59%) | |
| Race | 0.127 | ||
| White | 104 846 (57%) | 11 150 306 (53%) | |
| Hispanic | 46 532 (26%) | 5 186 339 (25%) | |
| Black | 12 550 (7%) | 1 679 988 (8%) | |
| Other/missing | 18 838 (10%) | 2 925 850 (14%) | |
| Median household income quartile by patient ZIP code | 0.279 | ||
| Quartile 1 | 65 813 (36%) | 5 785 651 (26%) | |
| Quartile 2 | 53 387 (29%) | 5 312 536 (24%) | |
| Quartile 3 | 39 373 (22%) | 5 237 059 (24%) | |
| Quartile 4 | 24 193 (13%) | 4 607 237 (21%) | |
| Smoking | 68 312 (37%) | 3 028 832 (14%) | 0.542 |
| Pulmonary disease diagnoses | |||
| Asthma | 1076 (1%) | 106 712 (0.5%) | 0.011 |
| COPD | 2083 (1%) | 519 148 (2%) | 0.101 |
| Pneumonia | 898 (0.5%) | 99 947 (0.5%) | 0.002 |
| Respiratory failure | 4031 (2%) | 463 840 (2%) | 0.001 |
| More than one of above | 690 (0.4%) | 93 378 (0.4%) | 0.01 |
Due to rounding, some percentages may not sum to 100%. Meth: methamphetamine; SMD: standardised mean difference; IQR: interquartile range.