Table 1. Demographic Data for 2012-2015 NFL Seasons.

NFL: National Football League

Demographics Data of Included Team Games (N = 960)
Variable	n	% out of 960 games	Mean Concussion Incidence	Confidence Interval	Standard Error
Mean Game Day Temperature Range in oF (20oF Increments)
< 20oF	11	1.15%	1.00	0.15 – 1.85	0.3814
21 to 40oF	134	13.96%	0.7313	0.58 – 0.88	0.07796
41 to 60oF	418	43.54%	0.6483	0.56 – 0.72	0.04102
61 to 80oF	362	37.71%	0.4751	0.40 - 0.54	0.0361
> 80oF	35	3.65%	0.3429	0.12 – 0.56	0.108
Mean-Game Day Temperature (Quartile Analysis)
< 40oF	145	15.10%	0.7517	0.59 – 0.90	0.07739
40 to 55oF	279	29.06%	0.6918	0.59 – 0.79	0.05147
55 to 70oF	363	37.81%	0.5041	0.42 – 0.58	0.0379
> 70oF	173	18.02%	0.4566	0.35 – 0.56	0.05279
Mean-Game Day Humidity
< 60%	273	28.44%	0.6190	0.52 – 0.71	0.04956
61 to 70%	259	26.98%	0.5444	0.44 – 0.64	0.04927
71 to 80%	253	26.35%	0.5968	0.50 – 0.69	0.04865
> 80%	175	18.23%	0.5886	0.47 – 0.71	0.06235
Mean-Game Day Barometric Pressure
< 30 inHg	374	38.96%	0.6070	0.52 – 0.69	0.04176
30.01 to 30.10 inHg	211	21.98%	0.5308	0.42 – 0.63	0.05129
30.11 to 30.20 inHg	181	18.85%	0.4641	0.36 – 0.56	0.05343
> 30.20 inHg	194	20.21%	0.7268	0.60 – 0.85	0.06424
Mean-Game Day Dew Point
< 30oF	203	21.15%	0.6650	0.55 – 0.77	0.05526
30 to 45oF	271	28.23%	0.6679	0.55 – 0.78	0.05705
45 to 60oF	343	35.73%	0.5685	0.48 – 0.64	0.04068
> 60oF	143	14.90%	0.3706	0.27 – 0.46	0.04829