Table 4. Factors associated with inadequate dosing of pyrazinamide among patients treated with Rifater or pyrazinamide in single-drug preparation, 2007–2010, Taipei.

	Adequate	Too high		Too low
	Number (%)	Relative RR	95% CI	Relative RR	95% CI
Sex
Female	699(82.9%)	1		1
Male	1275(69.6%)	1.00	0.61–1.63	1.98	1.54–2.54
Weight (kg)
≤39	92(77.3%)	1		1
40–49	635(88.1%)	1.09	0.55–2.15	0.13	0.06–0.29
≥50	1247(68.0%)	0.01	0.002–0.05	2.66	1.49–4.75
Preparations
Pyrazinamide	620(75.2%)	1		1
Rifater	1354(73.2%)	0.04	0.02–0.08	2.05	1.63–2.57

Adequate dosage (20–30 mg/kg) as the base for comparison. Too high, >30 mg/kg. Too low, <20 mg/kg. RR, risk ratio. CI, confidence interval.