Prevention Research Center, Carman and Ann Adams Department of Pediatrics, Wayne State University School of Medicine, Detroit, MI 48201, USA.
J Adolesc Health. 2011 Aug;49(2):193-8. doi: 10.1016/j.jadohealth.2010.11.252. Epub 2011 Mar 12.
More than 50% of youth living with HIV (YLH) have unprotected sex. In previous studies, we reported effects of a motivational interviewing-based multirisk reduction intervention, "Healthy Choices" in improving motivation, depression, and viral load in YLH. In this study, we report the effect of the intervention on increasing condom use.
Six waves of longitudinal data (n = 142) across a period from baseline through 15 months postintervention were analyzed. The developmental trajectory modeling method was used for program effect evaluation.
The three groups detected with distinct sexual risks were: Persistent low sexual risk (PLSR), delayed high sexual risk, and high and growing sexual risk with regard to levels and time trajectories of condom use throughout the trial. Receiving Healthy Choices increased the likelihood to be in the PLSR group (63% vs. 32%, p < .01) and reduced the likelihood to be in the delayed high sexual risk group (16% vs. 50%, p < .05). Receiving the intervention was also associated with progressive reductions in no-condom sex for PLSR youth (adjusted β = -.325, p < .01) and high and growing sexual risk youth (adjusted β = -.364, p < .01).
The motivational interviewing-based program Healthy Choices, when delivered in clinic settings, can prevent unprotected sex in subgroups of YLH, although more intensive interventions may be needed to change risk trajectories among those at highest risk of transmitting the AIDS virus. Developmental trajectory analysis provides an alternative approach to evaluate program effects for study samples that contain distinct subgroups.
超过 50%的感染艾滋病毒的青年(YLH)有不安全的性行为。在之前的研究中,我们报告了基于动机访谈的多重风险降低干预措施“健康选择”对改善 YLH 的动机、抑郁和病毒载量的影响。在这项研究中,我们报告了该干预措施对增加避孕套使用的效果。
使用发展轨迹建模方法对基线至干预后 15 个月的 6 个时间点的 142 名青年的纵向数据进行分析。
在整个试验过程中,根据避孕套使用的水平和时间轨迹,检测到了三组具有不同性风险的人群:持续低性风险(PLSR)、延迟高性风险和高且不断增加的性风险。接受“健康选择”增加了处于 PLSR 组的可能性(63%比 32%,p<0.01),并降低了处于延迟高性风险组的可能性(16%比 50%,p<0.05)。接受干预也与 PLSR 青年(调整后的β=-.325,p<0.01)和高且不断增加的性风险青年(调整后的β=-.364,p<0.01)无保护性行为的比例逐渐降低有关。
当在诊所环境中提供基于动机访谈的方案“健康选择”时,它可以防止 YLH 亚组发生无保护性行为,尽管可能需要更密集的干预措施来改变那些传播艾滋病病毒风险最高的人群的风险轨迹。发展轨迹分析为包含不同亚组的研究样本提供了一种评估方案效果的替代方法。