Table 2.

Visit Characteristics Per Primary Care Visit, 2008-2015

	2008a	2015a	Percent Changeb	8-Year Trendc (95% CI)
Mean visit duration, mind	19.3	21.6	12	2.4 (1.1-3.8)
Mean diagnoses, No.e	2.0	2.3	15	0.30 (0.16-0.43)
Mean medications, No.f	3.1	3.9	26	0.82 (0.59-1.1)
Mean preventive services, No.g	0.34	0.59	76	0.24 (0.12-0.36)
Mean procedures, No.h	0.06	0.08	33	0.02 (0.01-0.03)

NACMS = National Ambulatory Medical Care Survey.

^aPresented as 3-year rolling averages.

^bPercent change of each visit characteristic between 2008-2015.

^c8-year trend calculated for each subgroup by multiplying per-year regression coefficient across study period.

^dDirect time spent with physician in minutes.

^eNAMCS allows up to 3 write-in ICD-9/ICD-10 visit diagnoses (see Supplemental Appendix, http://www.AnnFamMed.org/content/17/6/538/suppl/DC1).

^fNAMCS allows up to 8 write-in medications.

^gMean of the following 9 preventive services that were consistent in NAMCS 2007-2016: cholesterol, A_1c, mammogram, depression screening, colonoscopy referral, bone-density, vaccines, chlamydia screening, Papanicolaou smear.

^hMean of up to 4 write-in ICD-9/ICD-10 procedures (see Supplemental Appendix, http://www.AnnFamMed.org/content/17/6/538/suppl/DC1), based on limit from 2007-2016.