Table 1.

Worksites in the WOW study and number (and percentage) of employees in random evaluation cohort

Worksite Pair #	Worksite Assignment	Worksite Type	Total # of Employees	# Opted Out	% Opted Out	Randomly Selected Sample	# Baseline Phone Surveys	% total Employee Pop.	# Baseline In-Person Surveys	% total Employee Pop.
1	Intervention	Manufacturing	430	11	3%	178	43	10%	34	8%
	Comparison	Manufacturing	356	77	22%	238	40	11%	38	11%
2	Intervention	Manufacturing	148	65	44	88	53	36%	52	35%
	Comparison	Manufacturing	127	31	24%	96	47	37%	44	35%
3	Intervention	Research & design/mfg	291	50	17%	213	97	33%	96	33%
	Comparison	Call center/mfg	329	93	28%	226	103	31%	100	30%
4	Intervention	Shipbuilding	244	17	7%	183	77	32%	76	31%
	Comparison	Manufacturing	249	81	33%	166	68	27%	63	25%
5	Intervention	Research & design/mfg	487	41	8%	261	98	20%	91	19%
	Comparison	Research & design/mfg	515	55	11%	285	66	13%	65	13%
6	Intervention	Medical/health care	295	17	6%	267	57	19%	47	16%
	Comparison	Research & design/mfg	361	35	10%	248	91	25%	88	24%
7	Intervention	Medical/health care	728	72	10%	317	106	15%	86	12%
	Comparison	Medical/health care	1309	71	5%	436	105	8%	88	7%
8	Intervention	Medical/health care	333	36	11%	236	88	26%	79	24%
	Comparison	Research & design/mfg	433	27	6%	250	86	20%	86	20%
9	Intervention	Manufacturing	381	157	41%	223	66	17%	62	16%
	Comparison	Manufacturing	177	94	53%	177	65	37%	65	37%
10	Intervention	Medical/health care	1300	71	5%	425	91	7%	79	6%
	Comparison	Medical/health care	515	59	11%	230	77	15%	74	14%
11	Intervention	Call center	332	17	5%	136	48	14%	45	14%
	Comparison	Call center	135	20	15%	133	52	39%	46	34%
12	Intervention	Medical/health care	195	5	3%	184	25	13%	24	12%
	Comparison	Medical/health care	225	9	4%	154	41	18%	38	17%
	TOTALS		9895	1211	12%	5350	1690	17%	1566	16%

Note: Of the 5350 randomly chosen employees, 1638 (25.8%) were unable to be reached for registration surveys within the allotted time, 1196 (22.4%) refused and 288 (5.4%) were ineligible due to age, pregnancy, language, no longer at company, employment status, and health reasons. Of the 2216 who completed registration, 247 (11.2%) were unable to be reached for baseline surveys within the allotted time, 251 (11.3%) refused and 28 (1.3%) were ineligible due to language, no longer at company, or employment status. After subtracting those who were ineligible, 30.3% of the randomly selected sample completed all baseline measures. We reached our goal of an average of 70 employees per site.