Table 1.

Basic characteristics of the included studies on temperature and crime or violence ($n=83$).

Study characteristics	$n$ (%)
Temperature linearity
Linear	44 (53.01)
Nonlinear	25 (30.12)
Both (linear and nonlinear)	5 (6.02)
Not mentioned	9 (10.84)
Crime and/or violence typea
Violent crime	64 (55.17)
Property crime	27 (23.28)
Sexual crime	14 (12.06)
Otherb	11 (9.48)
Length of study
$<5$ years	14 (16.87)
5–9 years	27 (32.53)
10–14 years	14 (16.87)
15–19 years	9 (10.84)
$\ge 20$ years	17 (20.48)
Elsec	2 (2.41)
Median year of the study period
$<1990$	7 (8.43)
1990–1999	12 (14.46)
2000–2009	22 (26.51)
$\ge 2010$	40 (48.19)
Elsec	2 (2.41)
Spatial scale
Multicity from one country	23 (27.71)
Multicity from multicountry	12 (14.46)
One city	41 (49.39)
One country	7 (6.02)
Temporal scale
Daily	50 (60.24)
Weekly	1 (1.20)
Monthly	17 (20.48)
Quarterly	1 (1.20)
Annual	14 (16.87)
Study continent
Africa	10 (12.05)
Asia	15 (18.07)
Europe	7 (8.43)
North America	39 (46.98)
Oceania	7 (8.43)
South America	1 (1.20)
Otherd	4 (4.82)

^a If a single study addressed multiple types of crime and/or violence, each was counted separately.

^b Other crime and/or violence types (e.g., civil war, angry tweets, political violence).

^c E.g., different study periods by city/country or different temporal scales (monthly, daily).

^d Other study continents where there are multiple countries spanning multiple continents analyzed for the study.