Incidence of new coding for dry eye and ocular infection in open-angle glaucoma and ocular hypertension patients treated with prostaglandin analogs: Retrospective analysis of three medical/pharmacy claims databases

Table 2 Derivation of analysis population

	Database
	MedStat	PharMetrics	i3-Ingenix	Total
All patients in the database	41,105,604	>60,000,000	22,689,623	>123,795,227
And filled prescription for latanoprost or travoprost-Z 10/2006 - Q2/2008	152,961	69,298	42,424	264,683
And continuous enrollment 6 months prior through 12 months after index date	84,871	35,447	23,091	143,409
And any open-angle glaucoma or ocular hypertension* diagnosis within 90 days prior to index date	31,760	14,713	9107	55,580
And no ocular surface disease* during 180 days prior to index date	28,711	12,833	7597	49,141
And no prescription for the index agent in 180 days prior to index date	15,154	4151	4298	23,603

*Defined in Table 1.
Index date = date of initial prescription for latanoprost or travoprost-Z; Q2 = second quarter.

ISSN: 1471-2415